4. Therefore, although wicked men press forward to keep the feast, and as at a feast praise God, and intrude into the Church of the saints, yet God expostulates, saying to the sinner, ‘Why dost thou talk of My ordinances?’ And the gentle Spirit rebukes them, saying, ‘Praise is not comely in the mouth of a sinner.’ Neither hath sin any place in common with the praise of God; for the sinner has a mouth speaking perverse things, as the Proverb saith, ‘The mouth of the wicked answereth evil things.’ For how is it possible for us to praise God with an impure mouth? since things which are contrary to each other cannot coexist. For what communion has righteousness with iniquity? or, what fellowship is there between light and darkness? So exclaims Paul, a minister of the Gospel.