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

"If geometry were as much opposed to our passions and present interests as is ethics, we should contest it and violate it but little less, notwithstanding all the demonstrations of Euclid and Archimede…"

"There are two kinds of truths: those of reasoning and those of fact."

"I do not conceive of any reality at all as without genuine unity."

"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."