There are follies as catching as infections. - François de La Rochefoucauld

No man is clever enough to know all the evil he does.

Man is so wretched that, while he shapes all of his conduct to gratify his passions, he groans incessantly under their tyranny. He can endure neither their violence, nor the violence that he would have to inflict on himself in order to rid himself of their yoke. He is frustrated not only by his vices, but also by the things that would cure them; and he cannot come to terms either with the discomfort of his afflictions or with the task of curing himself.

Le plus grand défaut de la pénétration n'est pas de n'aller point jusqu'au but, c'est de le passer.