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From Dom Guéranger's The Liturgical Year.

ONE of the grandest Saints in the Church’s Calendar is brought before us to-day. Leo, the Pontiff and Doctor, rises on the Paschal horizon, and calls for our admiration and love. As his name implies, he is the Lion of Holy Church; thus representing, in his own person, one of the most glorious of our Lord’s titles. There have been thirteen Popes who have had this name, and five of the number are enrolled in the catalogue of Saints; but not one of them has so honoured the name as he whose feast we keep to-day: hence he is called ‘Leo the Great.’

He deserved the appellation by what he did for maintaining the faith regarding the sublime mystery of the Incarnation. The Church had triumphed over the heresies that had attacked the dogma of the Trinity, when the gates of hell sought to prevail against the dogma of God having been made Man. Nestorius, a bishop of Constantinople, impiously taught that there were two distinct Persons in Christ the Person of the Divine Word, and the Person of Man. The Council of Ephesus condemned this doctrine, which, by denying the unity of Person in Christ, destroyed the true notion of the Redemption. A new heresy, the very opposite of that of Nestorianism, but equally subversive of Christianity, soon followed. The monk Eutyches maintained that in the Incarnation the human nature was absorbed by the Divine. The error was propagated with frightful rapidity. There was needed a clear and authoritative exposition of the great dogma, which is the foundation of all our hopes. Leo arose, and, from the Apostolic Chair, on which the Holy Ghost had placed him, proclaimed with matchless eloquence and precision the formula of the ancient faith—ancient indeed, and ever the same, yet ever acquiring greater and fresher brightness. A cry of admiration was raised at the General Council of Chalcedon, which had been convened for the purpose of condemning the errors of Eutyches. ' Peter,' exclaimed the Fathers, ‘Peter has spoken by the mouth of Leo!’ As we shall see further on, the Eastern Church has kept up the enthusiasm thus excited by the magnificent teachings given by Leo to the whole world.

The barbarian hordes were invading the West; the Empire was little more than a ruin: and Attila, ‘the Scourge of God,’ was marching on towards Rome. Leo's majestic bearing repelled the invasion, as his word had checked the ravages of heresy. The haughty king of the Huns, before whose armies the strongest citadels had fallen, granted an audience to the Pontiff on the banks of the Mincio, and promised to spare Rome. The calm and dignity of Leo—who thus unarmed confronted the most formidable enemy of the Empire, and exposed his life for his flock—awed the barbarian, who afterwards told his people that, during the interview, he saw a venerable person standing in an attitude of defence, by the side of Rome’s intercessor: it was the Apostle St Peter. Attila not only admired, he feared the Pontiff. It was truly a sublime spectacle, and one that was full of meaning—a priest, with no arms save those of his character and virtues, forcing a king, such as Attila, to do homage to a devotedness which he could ill understand, and recognize by submission the influence of a power which had heaven on its side. Leo, singlehanded and at once, did what it took the whole of Europe several ages to accomplish in later times.

That the aureole of Leo’s glory might be complete, the Holy Ghost gifted him with an eloquence which, on account of its majesty and richness, might deservedly be called papal. The Latin language had at that time lost its ancient vigour; but we frequently come across passages in the writings of our Saint which remind us of the golden age.

In exposing the dogmas of our holy faith, he uses a style so dignified and so impregnated with the savour of sacred antiquity, that it seems made for the subject. He has several admirable sermons on the Resurrection; and speaking of the present season of the liturgical year, he says: ‘The days that intervened between our Lord's Resurrection and Ascension were not days on which nothing was done: on the contrary, great were the sacraments then confirmed, and great were the mysteries that were revealed.'[1]

Let us now read the sketch of the Saint’s life given by the Church in the Matins of the feast.

Leo Primus, Etruscus, eo tempore præfuit Ecclesiæ, cum rex Hunnorum Attila, cognomento Flagellimi Dei, in Italiani invadens, Aquileiam triennii obsidione captam diripuit et incendit: unde cum Romam ardenti furore raperetur, jamque copias ubi Mincius in Padum influit, trajicere pararet, occurrit ei Leo, malorum Italiæ impendentium misericordia permotus: cujus divina eloquentia persuasum est Attilæ, ut regrederetur. Qui interrogatus a suis, quid esset quod præter consuetudinem tam humiliter romani Pontificis imperata faceret, respondit se astantem quemdam alium, illo loquente, sacerdotali habitu veritum esse, sibi stricto gladio minitantem mortem nisi Leoni obtemperar et. Quare in Pannoniam reversus est.

Leo autem Romæ omnium lætitia exceptus, paulo post invadenti Urbem Genserico, eadem eloquentiævi et sanctitatis opinione persuasit, ut ab incendio, ignominiis, ac cædibus abstineret. Sed cum Ecclesiam a multis hæresibus oppugnari, maximeque a Nestorianis et Eutychianis exagitari videret; ad eam purgandam, et in fide Catholica confirmandam, Concilium Chalcedonense indixit. Ubi sexcentis triginta coactis Episcopis, Eutyches et Dioscorus, et iterum Nestorius condemnati sunt: ejusdemque Concilii decreta sua auctoritate confirmavit.

His actis, sanctus Pontifex se ad reficiendas et ædificandas ecclesias convertit. Cujus suasu Demetria, pia femina, sancti Stephani Ecclesiam construxit in suo fundo via Latina, tertio ab Urbe miliario; ipse via Appia sub nomine sancti Cornelii alteram condidit. Multas præterea et sacras ædes et sacra earum vasa restituit. In tribus basilicis Petri, Pauli, et Constantiniana, cameras exstruxit: ædificavit monasterium vicinum basilicæ sancti Petri: sepulchris Apostolorum custodes adhibuit, quos Cubicularios appellavit. Statuit, ut in actione mysterii diceretur, Sanctum sacrificium, immaculatam hostiam. Sancivit ne monacha benedictum capitis velamen reciperet, nisi quadraginta annorum virginitatem probasset. His et aliis præclare gestis, cum multa sancte et luculenter scripsisset, quarto Idus Novembris obdormivit in Domino. Sedit in Pontificatu annos viginti unum, mensem unum, dies tredecim.
Leo the First, a Tuscan by birth, governed the Church at the period when Attila, the king of the Huns, surnamed the Scourge of God, was invading Italy. Attila pillaged and burned the city of Aquileia, which he took after a three years’ siege. This done, he rushed on Rome like a wild firebrand. He had reached the place where the Mincio joins the Po, and was on the point of ordering his troops to pass the river, when he was met by Leo, who was moved with compassion at the misfortunes that were threatening Italy. Such was his superhuman eloquence, that he induced Attila to retrace his steps. When asked by his people how it was that, contrary to his custom, he had yielded such ready obedience to the demands of the Roman Pontiff, the king answered, that he beheld, whilst Leo was speaking, a personage clad in priestly robes, who stood near, with a naked sword in his hand, and threatened him with death unless he obeyed the Pontiff. Whereupon he returned to Pannonia.

Leo was welcomed back to Rome amidst the exceeding joy of all. A short time after, when the city was invested by Genseric, the Pontiff’s eloquence and reputation for sanctity had such influence on the barbarian, that he abstained from setting fire to the buildings, and forbade his troops to insult or massacre the inhabitants. Seeing the Church attacked by several heresies, and mainly by the followers of Nestorius and Eutyches, he called the Council of Chalcedon, in order to remove error and vindicate the Catholic faith. Six hundred and thirty bishops assisted at this Council, in which Eutyches and Dioscorus and Nestorius were condemned (the latter for the second time). The decrees of the Council were confirmed by the authority of Leo.

The holy Pontiff then turned his attention to repairing and building churches. It was through his persuasion that a pious lady called Demetria built the Church of Saint Stephen on her own land on the Latin Way, three miles out of the city. He himself built one on the Appian Way, and dedicated it to Saint Cornelius. He repaired several others, and refurnished them with all the sacred vessels needed for the divine service. He built vaults under the Basilicas of S Peter, S Paul, and S John Lateran, and a monastery near the Vatican. He appointed guards, to whom he gave the name of Cubicularii, to watch at the Tombs of the Apostles. He ordered that these words should be added to the Canon of the Mass: Holy Sacrifice, spotless Host. He decreed that a nun should not receive the blessed veil unless she had observed virginity for forty years. After these and other similar admirable acts, and after writing much that was replete with piety and eloquence, he slept in the Lord, on the fourth of the Ides of November (November 10). He reigned as Sovereign Pontiff twenty-one years, one month, and thirteen days.

The Greek Church, in her Memea, has an office in honour of St Leo: we take from it the following stanzas. As they were composed before the Schism, they show us that the ancient Church of Constantinople believed the supremacy of the Roman Pontiff, and that it is not the Latins that have changed the faith. The Greeks keep the Feast of St Leo on February 18.

(Die XVIII Februarii)

O felix Pontifex, Leo inclyte, fidelibus sacerdotibus et martyribus consors effectus es; invictus enim in præliis apparuisti, et immobilis ut turris et arx pietatis; orthodoxissime et sapientissime Domini ineffabilem generationem prædicasti.

Orthodoxiæ rector, pietatis magister et sanctitatis, universe terre lumen, orthodoxorum Deo inspirata gloria, sapiens Leo, tuis doctrinis omnes illuminasti, lyra Spiritus Sancti.

Principis Apostolorum Petri cathedre heres factus, Ecclesie prefuisti; illius mente preditus, et zelo pro fide inflammatus.

Splendidissimo lumine refulgens, sancte Leo, ineffabilis et divinæ incarnationis sermonem clarescere fecisti, duplicem prædicans naturam, et duplicem incarnati Dei voluntatem.

Divinis resplendens dogmatibus, fulgorem orthodoxiae undique sparsisti, et hæreseos tenebras dispulisti; et vita discedens, o beate, lumen quod vesperam nescit inhabitas.

Filium unicum Christum et Dominum, ante sæcula ex Patre genitum, et propter nos ex Virgine natum et nobis similem in terris apparentem, mirabiliter praedicasti, o minister mysteriorum Deo inspirate.

Super thronum pontificata sedens gloriose, et ora leonum obturans, divinis veneranda Trinitatis dogmatibus, ovili tuo lumen Dei cognitionis splendescere fecisti. Ideo glorificatus fuisti, ut divinus Dei gratiæ initiatus sacerdos.

Velut sol omnisplendens ex occidente ortus es, mixtionem et confusionem Eutychetis sapienter dissipans, et Nestorii divisionem rejiciens; unum Christum in duabus substantiis indi visibili ter, immutabiliter, inconfuse venerari docens.

A Deo inspiratus, pietatis præcepta velut in tabulis descriptis figurasti, ut alter Moyses apparens divino populo; et in venerabilium conventu magistrorum exclamasti: Laudate, sacerdotes, benedicite; superexaltate Christum in sæcula.

Nunc coruscas, sacerdos Christi, pulchritudinis corona decoratus, et ut fidelis sacerdos, justitiam induisti, et in paradiso voluptatis mirabiliter exsultans, pro ovili tuo Dominum incessanter deprecare.

Nunc ubi sunt cathedrae, throni et ordines Patriar charum, beatissime Leo, tu etiam Pater dignanter intrasti ut verus Patriarcha, et fide et gratia circumsplendens: ideo omnes te semper beatificamus.
O happy Pontiff! glorious Leo! thou hast been made companion of the faithful priests and martyrs; for thou wast most invincible in battle, and immovable as a tower and fortress of religion. Thou didst proclaim, with most perfect orthodoxy and wisdom, the unspeakable generation of Christ.

O ruler of orthodoxy, teacher of religion and holiness, light of the whole earth, divinely inspired glory of true believers, wise Leo! thou enlightenest all men by thy teachings, O harp of the Holy Ghost!

Heir of the See of Peter, the Prince of the Apostles, thou didst preside over the Church: thou hadst his spirit, and wast inflamed with zeal for the faith.

Beaming with most bright light, thou, O holy Leo, didst admirably preach the ineffable and divine Incarnation, teaching the two natures, and the two wills of the Incarnate God.

Resplendent with the knowledge of divine truths, thou didst scatter on all sides the brightness of orthodoxy, and dispel the darkness of heresy. Departing this life, thou, O blessed one! now dwellest in the light that knows no setting.

O inspired minister of God’s mysteries, thou didst admirably preach that Christ is the Only Son and Lord, begotten of the Father before all ages, born for us of the Virgin, and dwelling on earth like unto us.

Seated with glory upon the throne of the pontificate, thou didst stop the mouths of lions, and madest to shine upon thy flock the light of the knowledge of God, by proclaiming the divine dogma of the adorable Trinity. Therefore hast thou been glorified as a holy Pontiff initiated in the grace of God.

Thou, as a dazzling sun, didst rise in the west and wisely dispel the error of Eutyches, who mingled and confused the two natures, and that of Nestorius, who divided them as though they were two Persons. Thou taughtest us to adore one Christ in two natures, inseparably, unchangeably, unconfusedly united.

Inspired of God, thou didst appear to the people of God as another Moses, showing them the commandments of religion written, as it were, on tables.Thou didst exclaim in the assembly of the venerable masters: ' Praise, O ye priests! and bless, and extol Christ for ever.'

Now, O priest of Christ! thou art brightly decked with a crown of beauty. As a faithful priest, thou hast put on justice. Pray unceasingly for thy flock, now that thou hast entered into the admirable joy of the Paradise of delights.

Thou, O most blessed Leo! hast worthily entered the abode where are the seats and thrones and ranks of the patriarchs; thou hast entered as a true patriarch, all resplendent with faith and grace. Therefore do we all celebrate thy name for ever.

Glory be to thee, O Jesus, Lion of the Tribe of Juda! that hast raised up in thy Church a Lion to defend her in those dark times, when holy Faith was most exposed to danger. Thou didst charge Peter to confirm his brethren[2] and we have seen Leo, in whom Peter lived, fulfil his office with sovereign authority. We have heard the acclamation of the holy Council, which, in admiration at the heavenly teachings of Leo, proclaimed the signal favour thou didst confer on thy flock, when thou badest Peter feed both sheep and lambs.

O holy Pontiff Leo! thou worthily didst represent Peter in his Chair, whence thy apostolic teaching ceased not to flow, ever beautiful in its truth and majesty. The Church of thine own day honoured thee as the great teacher of faith; and the Church of every succeeding age has recognized thee as one of the most learned Doctors and preachers of the divine word. From thy throne in heaven, where now thou reignest, pour forth upon us the understanding of the great mystery, which thou wast called on to defend. Under thy inspired pen, this mystery grows clear; we see how sublimely it harmonizes with all other mysteries; and faith delights at gaining so close a view of the divine object of its belief. Oh! strengthen this faith within us. The Incarnate Word is blasphemed in our own times; avenge his glory, by sending us men of thy zeal and learning.

Thou didst triumph over barbarian invaders: Attila acknowledged the influence of thy sanctity and eloquence, by withdrawing his troops from the Christian land they infested. In these our days, there have risen up new barbarians—civilized barbarians, who would persuade us that religion should be eliminated from education. and that the State, in its laws and institutions, should simply ignore our Lord Jesus Christ, the King to whom all power has been given, not only in heaven but on earth also.[3] Oh! help us by thy powerful intercession, for our danger is very great. Many are seduced, and have fallen into apostasy, whilst flattering themselves that they are still Christians. Pray that the light that is left within us may not be extinguished, and that the public scandals which now exist may be brought to an end. Attila was but a pagan; our modem statesmen and governments are, or at least call themselves, Christians: have pity cn them, and gain for them light to see the precipice to which they are hurrying society.

These days of Paschal Time remind thee, O holy Pontiff! of the Easters thou didst once spend here on earth, when, surrounded by the neophytes, thou gavest them the nourishment of thy magnificent discourses: pray for the faithful, who have this Easter risen to a new life with Christ. What they most need is a fuller and better knowledge of this their Saviour, in order that they may cling more closely to him, and persevere in his holy service. Thy prayers must obtain for them this knowledge; by thy prayers thou must teach them what he is both in his Divine and Human Nature: that as God he is their Last End, and their Judge after death; as Man, their Brother, their Redeemer, their Model. Bless, O Leo! and help the Pontiff who is now thy successor on the Chair of Peter. Show now thy love for that Rome whose sacred and eternal destinies were so frequently the subject of thy glowing and heavenly eloquence.


[1] Sermo lxxiii.
[2] St Luke xxii 32.
[3] St Matt. xxviii 18.