"The happier the man, the less he needs to be amused; like a healthy man who does not need to be drugged."

"The soul is a living mirror of the universe."

"every feeling is the perception of a truth..."

"Nothing is accomplished all at once, and it is one of my great maxims, and one of the most completely verified, that Nature makes no leaps: a maxim which I have called the law of continuity."

"The mind is not only capable of knowing [innate ideas], but further of finding them in itself; and if it had only the simple capacity to receive knowledge…it would not be the source of necessary truth…"