Ambrose of Milan
Catena Aurea · Lukasevangelium 6
And it came to pass in those days, that he went out into a mountain to pray, and continued all night in prayer to God. And when it was day, he called unto him his disciples: and of them he chose twelve, whom also he named apostles; Simon, (whom he also named Peter,) and Andrew his brother, James and John, Philip and Bartholomew, Matthew and Thomas, James the son of Alphæus, and Simon called Zelotes, And Judas the brother of James, and Judas Iscariot, which also was the traitor.
But what does it become thee to do when thou wouldest commence any work of piety, when Christ, about to send out His disciples, first prayed? for it follows, And when it was day, he called his disciples, &c. whom truly He destined to be the means of spreading the salvation of man through the world. Turn thy eyes also to the heavenly council. Not the wise men, not the rich, not the noble, but He chose to send out fishermen and publicans, that they might not seem to turn men to their grace by riches or by the influence of power and rank, and that the force of truth, not the graces of oratory, might prevail.