Spiritual wisdom consists in finding out the subtleties, policies, and depths of any indwelling sin... to trace this serpent in all its turnings and windings; be able to say, at its most secret actings, 'This is your old way and course; I know what you aim at.'

The seed of every sin is in every heart.

The beauty of the person of Christ, as represented in the Scripture, consists in things invisible unto the eyes of flesh. They are such as no hand of man can represent or shadow. It is the eye of faith alone that can see this King in his beauty. What else can contemplate on the untreated glories of his divine nature? Can the hand of man represent the union of his natures in the same person, wherein he is peculiarly amiable? What eye can discern the mutual communications of the properties of his different natures in the same person?

The vigour, and power, and comfort of our spiritual life depends on the mortification of the deeds of the flesh.

For to pretend that men may live habitually sinful lives without any attempt by the Spirit to mortify sin in them, nor with any desire for repentance, is to deny the Christian religion.

the whole Pelagian poison of free-will ... a clear exaltation of the old idol free-will into the throne of God ... That the decaying estate of Christianity have invented.

To suppose that whatever God requireth of us that we have power of ourselves to do, is to make the cross and grace of Jesus Christ of none effect.