Morals are in all countries the result of legislation and government; they are not African or Asian or European: they are good or bad.
No man has received from nature the right to command his fellow human beings.
Bad company is as instructive as licentiousness. One makes up for the loss of one's innocence with the loss of one's prejudices.
Although a man may wear fine clothing, if he lives peacefully; and is good, self-possessed, has faith and is pure; and if he does not hurt any living being, he is a holy man.
Disturbances in society are never more fearful than when those who are stirring up the trouble can use the pretext of religion to mask their true designs.
Gratitude is a burden, and every burden is made to be shaken off.
Our observation of nature must be diligent, our reflection profound, and our experiments exact. We rarely see these three means combined; and for this reason, creative geniuses are not common.
Gaiety is a quality of ordinary men. Genius always presupposes some disorder in the machine.