Indwelling Sin Work by Adding Deceit to its Power. Indwelling Sin - ch 8

What wisdom, what watchfulness, what serious frequent trial and examination of ourselves is required, to keep our hearts and minds in a heavenly frame, in the use and pursuit of earthly things, is not my present business to declare. This is evident, that the engine whereby the deceit of sin draws off and turns aside the mind in this matter is the pretence of the lawfulness of things about which it would have it exercise itself;