Wash yourselves; make yourselves clean; remove the evil of your deeds from before my eyes; cease to do evil,
16. Wash you, make you clean He exhorts the Jews to repentance, and points out the true way of it, provided that they wish to have their obedience approved by God. Hence we conclude that nothing can please God, unless it proceed from a pure conscience; for God does not, like men, judge of our works according to their outward appearance.
Though God had rejected their services as insufficient to atone for their sins while they persisted in them, yet he does not reject them as in a hopeless condition, but here calls upon them to forsake their sins, which hindered the acceptance of their services, and then all would be well. Let them not say that God picked quarrels with them; no, he proposes a method of reconciliation.
Commenting on Isaiah 1:16-20
Wash ye, make you clean, &c. These two words are to be regarded as one, since they intend the same thing, and suppose the persons spoken to to be unclean, as they were, notwithstanding their legal sacrifices and ceremonial ablutions; and are designed to convince them of it, to bring them to a sense of their inability to cleanse themselves, to lead them to inquire...