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

How came the bodies of animals to be contrived with so much art, and for what ends were their several parts? Was the eye contrived without skill in Opticks, and the ear without knowledge of sounds?...and these things being rightly dispatch’d, does it not appear from phænomena that there is a Being incorporeal, living, intelligent...?

All my discoveries have been made in answer to prayer.

We are to admit no more causes of natural things than such as are both true and sufficient to explain their appearances.

Oh Diamond! Diamond! thou little knowest the mischief done! [Apocryphal]

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.

To any action there is always an opposite and equal reaction; in other words, the actions of two bodies upon each other are always equal and always opposite in direction.