If I have seen farther than others, it is because I was standings on the shoulders of giants

A man may imagine things that are false, but he can only understand things that are true, for if the things be false, the apprehension of them is not understanding

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

No great discovery was ever made without a bold guess

I was like a boy playing on the sea-shore, and diverting myself now and then finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me