Are iniquity and deceit, i.e. are wicked and deceitful. Once he had some shadows or degrees of wisdom, and sometimes did some things that were good in their kind; but new he hath not so much as the appearance of it, and is become an open apostate from that which once he professed.
Related Commentaries of Psalms 36:3
Psalms 36:3
3 The words of his mouth are iniquity and deceit: he hath left off to be wise, and to do good.