Matthew 6:17 - Clarke's commentary and critical notes on the Bible

But thou, when thou fastest, anoint thine head, and wash thy face; Anoint thine head and wash thy face - These were forbidden in the Jewish canon on days of fasting and humiliation; and hypocrites availed themselves of this ordinance, that they might appear to fast. Our Lord, therefore, cautions us against this: as if he had said, Affect nothing - dress in thy ordinary manner, and let the whole of thy deportment prove that thou desirest to recommend my soul to God, and not thy face to men. That factitious mourning, which consists in putting on black clothes, crapes, etc., is utterly inconsistent with the simplicity of the Gospel of Christ; and if practised in reference to spiritual matters, is certainly forbidden here: but sin is so common, and so boldly persisted in, that not even a crape is put on, as an evidence of deploring its influence, or of sorrow for having committed it.