Good music is very close to primitive language.
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.
Morals are in all countries the result of legislation and government; they are not African or Asian or European: they are good or bad.
Gaiety is a quality of ordinary men. Genius always presupposes some disorder in the machine.