There is such a thing as a hatred of lies and dissimulation, which is the outcome of a delicate sense of humor; there is also the selfsame hatred but as the result of cowardice, in so far as falsehood is forbidden by Divine law. Too cowardly to lie.

The misunderstanding of passion and reason, as if the latter were an independent entity and not rather a system of relations between various passions and desires; and as if every passion did not possess its quantum of reason.

When marrying, ask yourself this question: Do you believe that you will be able to converse well with this person into your old age? Everything else in marriage is transitory.

Not he is great who can alter matter, but he who can alter my state of mind.

Ten times must you laugh during the day, and be cheerful; otherwise your stomach, the father of affliction, will disturb you in the night.

Do you believe then that the sciences would ever have arisen and become great if there had not before hand been magicians, alchemists, astrologers and wizards, who thirsted and hungered after abscondite and forbidden powers?

It has therewith come to be recognized that the history of moral valuations is at the same time the history of an error, the error of responsibility, which is based upon the error of the freedom of will.