Vincent, born in Spain in 1350, entered at the age of 18 in the Order of Preachers and gave lustre to the Church by his virtues and his preaching (Collect). He was called the "Angel of the Judgment" and he went over the whole of Europe, warning sinners "to be ready for the Son of man who will come at an unexpected hour" (Gospel). The words of the prophet: "Arise, ye dead, and come to jugdment," which he constantly repeated, caused the many miraculous conversions of which his life is full (Epistle). He put forth the proposal to end the Western schism by deposing the three Popes who claimed the tiara and declared himself in favour of Martin V. He died at Vannes in Brittany, in 1419.
Let us deserve by penance to escape being condemned by the God who is to judge us.
Os justi meditabitur sapientiam, et lingua ejus loquetur judicium; lex Dei ejus in corde ipsius. * Noli aemulari in malignantibus: neque zelaveris facientes iniquitatem.
The mouth of the just shall meditate wisdom, and his tongue shall speak judgement: the law of his God is in his heart. * Be not emulous of evildoers: nor envy them that work iniquity.
(Psalm 36:30-31,1 from the Introit of Mass)
Deus, qui Ecclesiam tuam beati Vincentii Confessoris tui meritis et praedicatione illustrare dignatus es: concede nobis famulis tuis; ut et ipsius instruamur exemplis, et ab omnibus ejus patrocinio liberemur adversis.
O God, who wast pleased to make Thy Church illustrious by the merits and preaching of blessed Vincent, Thy confessor, grant that we Thy servants may be instructed by his example and be freed from all adversity by his protection. Through our Lord.
From the Catholic Encyclopaedia: http://www.newadvent.org/cathen/15437a.htm