In the state of nature, wrong-doing is impossible; or, if anyone does wrong, it is to himself, not to another. For no one by the law of nature is bound to please another, unless he chooses, nor to hold anything to be good or evil, but what he himself, according to his own temperament, pronounces to be so; and, to speak generally, nothing is forbidden by the law of nature, except what is beyond everyone's power.
Baruch SpinozaThe more intelligible a thing is, the more easily it is retained in the memory, and counterwise, the less intelligible it is, the more easily we forget it.
Baruch SpinozaHe who has a true idea, knows at that same time that he has a true idea, nor can he doubt concerning the truth of the thing.
Baruch SpinozaSurely human affairs would be far happier if the power in men to be silent were the same as that to speak. But experience more than sufficiently teaches that men govern nothing with more difficulty than their tongues.
Baruch Spinoza