I have not been able to discover the cause of those properties of gravity from phenomena, and I frame no hypotheses; for whatever is not deduced from the phenomena is to be called a hypothesis, and hypotheses, whether metaphysical or physical, whether of occult qualities or mechanical, have no place in experimental philosophy.

You have to make the rules, not follow them

A man may imagine things that are false, but he can only understand things that are true, for if the things be false, the apprehension of them is not understanding.

A body in motion tends to stay in motion unless acted on by an outside force.

Where both are friends, it is right to prefer truth.

God in the beginning formed matter in solid, massy, hard, impenetrable, movable particles, of such sizes and figures, and with such other properties, and in such proportion to space, as most conduced to the end for which he formed them.

Every particle of matter is attracted by or gravitates to every other particle of matter with a force inversely proportional to the squares of their distances.