Accordingly sins are divided into these three, viz. sins of thought, word, and deed, not as into various complete species: for the consummation of sin is in the deed, wherefore sins of deed have the complete species; but the first beginning of sin is its foundation, as it were, in the sin of thought; the second degree is the sin of word, in so far as man is ready to break out into a declaration of his thought; while the third degree consists in the consummation of the deed. Consequently these three differ in respect of the various degrees of sin. Nevertheless it is evident that these three belong to the one complete species of sin, since they proceed from the same motive. For the angry man, through desire of vengeance, is at first disturbed in thought, then he breaks out into words of abuse, and lastly he goes on to wrongful deeds; and the same applies to lust and to any other sin.