Gottfried Wilhelm Leibniz — "For I hold that it is only when we can prove everything we assert that we unders…"

"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."

"I am convinced that the unwritten knowledge scattered among men of different callings surpasses in quantity and in importance anything we find in books, and that the greater part of our wealth has yet…"

"The more perfect a substance is, the more it mirrors the universe."

"Time is the order of successive phenomena."

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