A great doctor kills more people than a great general.
Taking mathematics from the beginning of the world to the time when Newton lived, what he had done was much the better half.
The world is not a machine. Everything in it is force, life, thought.
It is a good thing to proceed in order and to establish propositions. This is the way to gain ground and to progress with certainty.
There are also two kinds of truths: truth of reasoning and truths of fact.
It is unworthy of excellent men to lose hours like slaves in the labor of calculation which could be relegated to anyone else if machines were used.