And therefore the Philosopher [Aristotle] says in Metaphysics VI that good and evil, which are objects of the will, are in things, but truth and error, which are objects of the intellect, are in the mind.

Good can exist without evil, whereas evil cannot exist without good....

Wherefore if forgers of money and other evil-doers are forthwith condemned to death by the secular authority, much more reason is there for heretics, as soon as they are convicted of heresy, to be not only excommunicated but even put to death

But man is freer than all the animals, on account of his free-will, with which he is endowed above all other animals

Happiness is secured through virtue; it is a good attained by man's own will.

The test of the artist does not lie in the will with which he goes to work, but in the excellence of the work he produces.