Man can sin against nature in two ways. First, when he sins against his specific rational nature, acting contrary to reason. In this sense, we can say that every sin is a sin against man's nature, because it is against man's right reason.

He (Mohammed) seduced the people by promises of carnal pleasure to which the concupiscence of the flesh urges us. His teaching also contained precepts that were in conformity with his promises, and he gave free rein to carnal pleasure. In all this, as is not unexpected; he was obeyed by carnal men. As for proofs of the truth of his doctrine, he brought forward only such as could be grasped by the natural ability of anyone with a very modest wisdom. Indeed, the truths that he taught he mingled with many fables and with doctrines of the greatest falsity.

Concerning perfect blessedness which consists in a vision of God.

When the devil is called the god of this world, it is not because he made it, but because we serve him with our worldliness.

Rarely affirm, seldom deny, always distinguish.

Mistakes are made on two counts: an argument is either based on error or incorrectly developed.

Beware the man of a single book.