Love is above the laws, above the opinion of men; it is the truth, the flame, the pure element, the primary idea of the moral world.

The education of life perfects the thinking mind, but depraves the frivolous.

It is obvious that the most despotic forms of social organization would be suitable for inert men who are satisfied with the situation fate has placed them in, and that the most abstract form of democratic theory would be practicable among sages guided only by their reason. The only problem is to what degree it is possible to excite or to contain the passions without endangering public happiness.

If it were not for respect for human opinions, I would not open my window to see the Bay of Naples for the first time, whilst I would go five hundred leagues to talk with a man of genius whom I had not seen.

Search for the truth is the noblest occupation of man; its publication is a duty.

One must choose in life between boredom and suffering.

Whatever efforts one may make, one must revert to the realization that religion is the real basis of morality; religion is the real and perceptible purpose within us, which alone, can turn aside our attention from things. ... The science of morality can no more teach human beings to be honest, in all the magnificence of this word, than geometry can teach one how to draw.