Think then, what position can be more brilliant than that of the holy Apostles? or what more attractive of attention than their friendship with God? A man who is of little account in life would not be likely to experience this passion: for it always avoids one who possesses nothing that others can envy and nothing that is inaccessible to those whose lot is of no consequence in the world; for how could such a one possibly exhibit vainglory on any subject whatever? But pride is a feeling dear to a man when he is in an enviable position, and when for this reason he thinks himself better than his neighbour; foolishly supposing that he differs very greatly from the rest of mankind, as having achieved some special and surpassing degree of excellence, or as having followed a path of policy unfamiliar to and untrodden by the rest of the world. Since therefore it has come to be regularly characteristic of all who hold brilliant positions to be liable to attacks of the infirmity of pride, it was surely needful for the holy Apostles to find in Christ a Pattern of a modest temper; so that, having the Lord of all as their model and standard, they themselves also might mould their own hearts according to the Divine will. In no other way therefore (as it seems) could He rid them from the infirmity, except by teaching them clearly that each one should regard himself as inferior in honour to the rest, even so far as to feel bound to undertake the part of a servant, without shrinking from discharging even the lowest of menial offices; [and this He taught them] by both washing the feet of the brethren and girding on a towel in order to perform the act. For consider what utterly menial behaviour it is, I mean according to the world's way of thinking and outward practice. Therefore Christ has become a Pattern of a modest and unassuming temper to all living men, for we must not suppose the teaching was meant for the disciples alone. Accordingly the inspired Paul also, taking Christ as a standard, exhorts to this end, saying: Let each one of you have this mind in himself, which was also in Christ Jesus. And again: In lowliness of mind each counting other better than himself. For in a lowly temper there is established a settled habit of love and of yielding to the will of others.
St. Cyril of Alexandria, Commentary on the Gospel of John, Book IX