Music is a hidden arithmetic exercise of the soul, which does not know that it is counting.

If we were magically shrunk and put into someone's brain while she was thinking, we would see all the pumps, pistons, gears and levers working away and we would be able to describe the workings completely, in mechanical terms, thereby completely describing the thought processes of the brain. But that description would not contain any mention of thought! It would contain nothing but descriptions of pumps, pistons, levers!

There is nothing without reason.

The greatness of a life can only be estimated by the multitude of its actions. We should not count the years, it is our actions which constitute our life.

Natural religion itself, seems to decay very much. Many will have human souls to be material: others make God himself a corporeal being.

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.

Taking mathematics from the beginning of the world to the time when Newton lived, what he had done was much the better half.