We should like Nature to go no further; we should like it to be finite, like our mind; but this is to ignore the greatness and majesty of the Author of things.

The art of discovering the causes of phenomena, or true hypotheses, is like the art of deciphering, in which an ingenious conjecture often greatly shortens the road.

Imaginary numbers are a fine and wonderful refuge of the divine spirit almost an amphibian between being and non-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.

According to their [Newton and his followers] doctrine, God Almighty wants to wind up his watch from time to time: otherwise it would cease to move. He had not, it seems, sufficient foresight to make it a perpetual motion. Nay, the machine of God's making, so imperfect, according to these gentlemen; that he is obliged to clean it now and then by an extraordinary concourse, and even to mend it, as clockmaker mends his work.

The present is great with the future.

Nihil est sine ratione. There is nothing without a reason.