For he was numbered with us, and had obtained part of this ministry.
All Commentaries on Acts 1:17 Go To Acts 1
Thomas Aquinas
AD 1274
Therefore, since Judas was one of the twelve, it seems that he was chosen. I answer that one can be chosen in two ways. One is for a present righteousness; and Judas was chosen for this. The other is for final glory; and Judas was not chosen for this. Our Lord chose Judas, whom he knew would become an evil person, so that we could realize that there would be no human society which does not have some evil members: We can also understand from this that if a bishop receives someone into the Church, and this person becomes bad, the bishop should not be blamed.