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.

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

He who hasn't tasted bitter things hasn't earned sweet things.

God's relation to spirits is not like that of a craftsman to his work, but also like that of a prince to his subjects.

There are two famous labyrinths where our reason very often goes astray. One concerns the great question of the free and the necessary, above all in the production and the origin of Evil. The other consists in the discussion of continuity, and of the indivisibles which appear to be the elements thereof, and where the consideration of the infinite must enter in.

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

I hold that the mark of a genuine idea is that its possibility can be proved, either a priori by conceiving its cause or reason, or a posteriori when experience teaches us that it is in fact in nature.