John 17:19

And for them do I sanctify myself [6]. St. Augustine expounds it, I sanctify them, who are my members, in myself. The interpretation of St. John Chrysostom and St. Cyril, seems preferable, that to sanctify in the style of Scriptures, is oftentimes the same as to offer up a sacrifice: so the sense here is, I sacrifice, and offer up myself on the cross for them and all mankind. (Witham) --- By this Christ shews, that he sanctified the apostles, by sanctifying himself; because they are the members of his body. (St. Augustine, tract. 107. in Joan.) --- Or, according to St. John Chrysostom, I offer myself up to be the victim in their behalf. For victims, and whatever is dedicated to God, are called holy. He, their head, was offered up, and they also are immolated, according to that of the apostle, Romans xii. Exhibit your members a living sacrifice, holy, &c. (St. John Chrysostom, hom. lxxxi. in Joan.)

[BIBLIOGRAPHY]

Sanctifico meipsum. Quid est hoc, says St. Augustine, (tract. 108.) nisi eos in meipso Sanctifico, quoniam membra ejus sunt? St. John Chrysostom, (hom. Greek: pb. p. 484) Offero tibi Sacrificium, Greek: prosphero soi thusian. St. Cyril says the same, lib. xi. in Joan. p. 989.