The monad, of which we shall speak here, is nothing but a simple substance which enters into compounds; simple, that is to say, without parts.
Gottfried LeibnizI have said more than once, that I hold space to be something purely relative, as time; an order of coexistences, as time is an order of successions.
Gottfried LeibnizEvery present state of a simple substance is the natural consequence of its preceding state, in such a way that its present is big with its future.
Gottfried LeibnizThere 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.
Gottfried Leibniz