John 10:10

The thief cometh not, &c. He shows what is the end and aim of him whom before He called a thief, and what on the contrary was His own. The thief and robber of the sheep, as for instance a heretic or schismatic, a Scribe or Pharisee, or especially a false-Christ, comes to carry off the sheep (i.e., the faithful) from God and the Church, whose property they are, to hand them over to the synagogue of Satan, and there kill them by heresy and sin, and cast them into hell. But I who am the true Shepherd of the sheep (i.e., of the faithful) came down from heaven, not for My own sake, but for that of the faithful, that being freed by Me, they may have the life of grace, even yet more abundantly. The word πεζισσὸν may be taken either as an adverb (abundantly), or as an adjective (abundant), that is, surpassing, exceeding all measure, that is, that they may abound in My doctrine and grace, and may live thereby, quick in spirit, enriched with spiritual gifts both in this world by grace, and in the world to come by glory. So S. Cyril and others. Rupertus adds, "that Christians may have more abundant grace than the Jews under the old law." This abounding life of the spirit, inspired by Christ, you may see in S. Peter and the other Apostles, in Martyrs, Confessors, Virgins, &c. Hence the glowing language of S. Paul, "Who shall separate us from the love of Christ," &c. (Rom. viii.)