33. Chap. XVIII.
As to the feet-washing, since the Lord recommended this because of its being an example of that humility which He came to teach, as He Himself afterwards explained, the question has arisen at what time it is best, by literal performance of this work, to give public instruction in the important duty which it illustrates, and this time [of Lent] was suggested in order that the lesson taught by it might make a deeper and more serious impression. Many, however, have not accepted this as a custom, lest it should be thought to belong to the ordinance of baptism; and some have not hesitated to deny it any place among our ceremonies. Some, however, in order to connect its observance with the more sacred associations of this solemn season, and at the same time to prevent its being confounded with baptism in any way, have selected for this ceremony either the eighth day itself, or that on which the third eighth day occurs, because of the great significance of the number three in many holy mysteries.