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

I keep the subject of my inquiry constantly before me, and wait till the first dawning opens gradually, by little and little, into a full and clear light.

Philosophy is such an impertinently litigious lady that a man had as good be engaged in lawsuits as have to do with her.

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

Poetry is a kind of ingenious nonsense.

I see I have made my self a slave to Philosophy.

I have presented principles of philosophy that are not, however, philosophical but strictly mathematical-that is, those on which the study of philosophy can be based. These principles are the laws and conditions of motions and of forces, which especially relate to philosophy.