1 You know, Brethren, for you have learned it as believing in Christ, and continually too do we by our ministry impress it upon you, that the humility of Christ is the medicine of man's swollen pride. For man would not have perished, had he not been swollen up through pride. For “pride,” as says the Scripture, “is the beginning of all sin.” Against the beginning of sin, the beginning of righteousness was necessary. If then pride be the beginning of all sin, whereby should the swelling of pride be cured, had not God vouchsafed to humble Himself? Let man blush to be proud, seeing that God has humbled Himself. For when man is told to humble himself, he disdains it; and when men are injured, it is pride that makes them wish to be avenged. Forasmuch as they disdain to humble themselves, they wish to be avenged; as if another's punishment could be any profit to any man. One who has been hurt and suffered wrong wishes to be avenged; he seeks his own remedy from another's punishment, and gains a great torment. The Lord Christ therefore vouchsafed to humble Himself in all things, showing us the way; if we but think meet to walk thereby.
Source: Sermons on Selected Lessons of the New Testament (New Advent)