"Every present state of a simple substance is a natural consequence of its preceding state, in such a way that its present is big with its future."

"There are two labyrinths of the human mind: one concerns the composition of the continuum, and the other the nature of freedom, and both spring from the same source—the infinite."

"The actual world is the most beautiful possible."

"God has chosen the best of all possible worlds, not because it is the most perfect in every respect, but because it is the most perfect in the whole."

"The universe is a machine, but a divine machine."