Freedom is absolutely necessary for the progress in science and the liberal arts.
Desire nothing for yourself, which you do not desire for others.
The 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.
Reality and perfection are synonymous.
He, who knows how to distinguish between true and false, must have an adequate idea of true and false.
Laws which prescribe what everyone must believe, and forbid men to say or write anything against this or that opinion, are often passed to gratify, or rather to appease the anger of those who cannot abide independent minds.