We must therefore consider who He was who was baptized, and by whom and when: seeing He was pure, baptized by John, and at a time when His miracles had begun, that we might thence derive the lesson of purifying ourselves beforehand, and of embracing humility, and of not beginning to preach until the maturity of our spiritual and natural life. The first of these was said for their sakes who are receiving baptism; for although the gift of baptism brings remission, yet we must fear lest we return again to our vomit. The second is pointed at those who exalt themselves against the stewards of the mysteries, whom they may excel in rank. The third was uttered for those who trust in their youth, and imagine that any age is fit for promotion and teaching. Jesus is cleansed, and dost thou despise purification? By John, and dost thou say ought against thy teacher. At thirty years old, but dost thou in teaching precede thy elders? But the example of Daniel and the like are ready in thy mouth, for every guilty person is ready with an answer. But that is not the law of the Church which seldom happens, as neither does a single swallow make the spring.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Orat. 39.