“God created everything by number, weight and measure.”

I have explained the phenomena of the heavens and of our sea by the force of gravity, but I have not yet assigned a cause to gravity.

Absolute, true and mathematical time, of itself, and from its own nature flows equably without relation to anything external.

The proper method for inquiring after the properties of things is to deduce them from experiments.

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

It seems probable to me that God, in the beginning, formed matter in solid, massy, hard, impenetrable, moveable particles.

Tis much better to do a little with certainty & leave the rest for others that come after than to explain all things by conjecture without making sure of any thing.

Oh Diamond! Diamond! thou little knowest the mischief done!

To arrive at the simplest truth requires years of contemplation.

Hypotheses should be subservient only in explaining the properties of things but not assumed in determining them, unless so far as they may furnish experiments.

The moon gravitates towards the earth and by the force of gravity is continually drawn off from a rectilinear motion and retained in its orbit.

We account the Scriptures of God to be the most sublime philosophy.

Therefore, the causes assigned to natural effects of the same kind must be, so far as possible, the same.

Physics, beware of metaphysics.

I feign no hypotheses.

Atheism is so senseless and odious to mankind that it never had many professors.

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.