And he began to teach them, that the Son of man must suffer many things, etc. In St. Matthew's narrative he says (Matthew 16:21), "From that time began Jesus to show unto his disciples," etc.—from the time, that is, of this great confession; from the time when he had openly acknowledged to his disciples the truth of his essential Divinity; from that time he began to instruct them as to his passion and his death. There are two great principles of faith, namely,
And it was necessary that the disciples should be thus instructed in his amazing dignity as the Son of God, lest, when they saw him put to death, they might doubt as to his Godhead. And after three days rise again. St. Matthew and St. Luke say, "on the third day"—the day of his death counting for one, and the day of his resurrection for another, with one clear day intervening.