De Sobrietate

For as the power of fire is quiet when it has no fuel, but when there are proper materials it blazes up; so also all the powers which have reference to the virtue or vice of the soul are extinguished by want of opportunity, as I have said before, but are kindled by a favourable occasion and a happy concurrence of circumstances.

Why then have I said these things, except with the object of teaching that Ham, the son of Noah, is the name of wickedness in a state of inactivity, but his grandson, Canaan, is the name of wickedness in a state of motion? For Ham being interpreted, means "warm," but Canaan means "commotion;"

and warm in a body implies fever, but in the soul it implies wickedness. For as I suppose disease is the foundation of fever, not only of a part but of the whole body; so also wickedness is a disease of the whole soul. But at one time it is in a state of tranquillity, and at another in motion; now he calls its motion commotion (σάλος), which in the Hebrew language is called Canaan.