It's easier to be original and foolish than original and wise.

These principles have given me a way of explaining naturally the union or rather the mutual agreement [conformité] of the soul and the organic body. The soul follows its own laws, and the body likewise follows its own laws; and they agree with each other in virtue of the pre-established harmony between all substances, since they are all representations of one and the same universe.

Music is a hidden arithmetic exercise of the soul, which does not know that it is counting.

In my judgment an organic machine new to nature never arises, since it always contains an infinity of organs so that it can express, in its own way, the whole universe; indeed, it always contains all past and present times.

What is is what must be.

The words 'Here you can find perfect peace' can be written only over the gates of a cemetery.

Indeed in general I hold that there is nothing truer than happiness, and nothing happier and sweeter than truth.