“Physics, beware of metaphysics.”

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

Genius is patience.

Whence arises all that order and beauty we see in the world?

Nothing can be divided into more parts than it can possibly be constituted of. But matter (i.e. finite) cannot be constituted of infinite parts.

I do not think that this [the universe] can be explained only by natural causes, and are forced to impute to the wisdom and ingenuity of an intelligent.

Christ comes as a thief in the night, & it is not for us to know the times & seasons which God hath put into his own breast.

Pictures, propagated by motion along the fibers of the optic nerves in the brain, are the cause of vision.

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.

God created everything by number, weight and measure.

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.