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

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

Opposite to godliness is atheism in profession, and idolatry in practice. Atheism is so senseless and odious to mankind, that it never had many professors.

Let me think – I wonder if an anvil will drop like an apple?

If the experiments which I urge be defective, it cannot be difficult to show the defects; but if valid, then by proving the theory, they must render all objections invalid.

When two forces unite, their efficiency double.

The best way to understanding is a few good examples.

The great ocean of truth lay all undiscovered before me.

The centre of the system of the world is immovable.

All knowledge and understanding of the Universe was no more than playing with stones and shells on the seashore of the vast imponderable ocean of truth.

Every body persists in a state of rest or of uniform motion in a straight line, unless it is compelled to change that state by forces having impact upon it.

An object that is at rest will tend to stay at rest. An object that is in motion will tend to stay in motion.

If I have ever made any valuable discoveries, it has been due more to patient attention, than to any other talent.

What goes up must come down.

Yet one thing secures us what ever betide, the scriptures assures us that the Lord will provide.

Hypotheses non fingo. I frame no hypotheses.

To explain all nature is too difficult a task for any one man or even for any one age.

I took especially great pleasure in mathematics because of the certainty and the evidence of its arguments.

With me, everything turns into mathematics.

I often considered whether there could perhaps be found a more reasonable arrangement of circles.

There are things which seem incredible to most men who have not studied mathematics.

But in my opinion, all things in nature occur mathematically.

Don’t disturb my circles!

Mathematics reveals its secrets only to those who approach it with pure love, for its own beauty.

Fellow, stand away from my diagram.