A cylinder of air reaching to the top of the atmosphere is of equal weight with a cylinder of water about 33 feet high..

To derive two or three general Principles of Motion from Phænomena, and afterwards to tell us how the Properties and Actions of all corporeal Things ….

Bullialdus wrote that all force respecting ye Sun as its center & depending on matter must be reciprocally in a duplicate ratio of ye distance from y….

Absolute, true, and mathematical time, in and of itself and of its own nature, without reference to anything external, flows uniformly and by another….

I see I have made myself a slave to Philosophy, but if I get free of Mr. Linus's business I will resolutely bid adew to it eternally, excepting for w….

Through algebra you easily arrive at equations, but always to pass therefrom to the elegant constructions and demonstrations which usually result by ….

What Descartes did was a good step. You have added much several ways, and especially in taking the colours of thin plates into philosophical consider….

The way to chastity is not to struggle directly with incontinent thoughts but to avert the thoughts by some imployment, or by reading, or meditating ….

I have presented principles of philosophy that are not, however, philosophical but strictly mathematical-that is, those on which the study of philoso….

Do not great Bodies conserve their heat the longest, their parts heating one another, and may not great dense and fix'd Bodies, when heated beyond a ….

As in Mathematicks, so in Natural Philosophy, the Investigation of difficult Things by the Method of Analysis, ought ever to precede the Method of Co….

The folly of Interpreters has been, to foretell times and things by this Prophecy, as if God designed to make them Prophets. By this rashness they ha….

He that in ye mine of knowledge deepest diggeth, hath, like every other miner, ye least breathing time, and must sometimes at least come to terr. alt….

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

Godliness consists in the knowledge love & worship of God, Humanity in love, righteousness & good offices towards man..

If the ancient churches, in debating and deciding the greatest mysteries of religion, knew nothing of these two texts, I understand not why we should….

Do not Bodies act upon Light at a distance, and by their action bend its Rays; and is not this action (caeteris paribus) [all else being equal] stron….

The best and safest way of philosophising seems to be, first to enquire diligently into the properties of things, and to establish those properties b….

Did blind chance know that there was light and what was its refraction, and fit the eyes of all creatures after the most curious manner to make use o….

My Design in this Book is not to explain the Properties of Light by Hypotheses, but to propose and prove them by Reason and Experiments: In order to ….

I can see so far because I stood on the shoulders of giants..