Fear is the mother of morality.

If we train our conscience, it kisses us while it hurts

Follow in the footsteps of your fathers' virtue! How could you hope to climb high unless your fathers' will climbs with you?

Certitude drives people mad.

Even in the lust of knowledge I feel only my will's delight in begetting and becoming; and if there be innocence in my knowledge it is because my procreative will is in it.

One does not want to be deceived, under the supposition that it is injurious, dangerous, or fatal to be deceived.

One has to pay dearly for immortality; one has to die several times while one is still alive.