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

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

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

If I have done the public any service, it is due to my patient thought.

The qualities of bodies, which admit neither intension nor remission of degrees, and which are found to belong to fill bodies within the reach of our experiments, are to be esteemed the universal qualities of all bodies whatsoever.

I do not know what I may appear to the world, but to myself I seem to have been only a boy playing on the seashore.

I am ashamed to tell you to how many figures I carried these calculations [of Pi], having no other business at the time