...from the same principles, I now demonstrate the frame of the System of the World.

Therefore to the same natural effects we must, as far as possible, assign the same causes.

My principal method for defeating error and heresy is by establishing the truth. One purposes to fill a bushel with tares, but if I can fill it first with wheat, I may defy his attempts.

No old Men (excepting Dr. Wallis) love Mathematicks.

He who thinks half-heartedly will not believe in God; but he who really thinks has to believe in God.

We are to admit no more causes of natural things than such as are both true and sufficient to explain their appearances.

In experimental philosophy, propositions gathered from phenomena by induction should be considered either exactly or very nearly true notwithstanding any contrary hypotheses, until yet other phenomena make such propositions either more exact or liable to exceptions.