Physics, beware of metaphysics.

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

Where both are friends, it is right to prefer truth.

We account the Scriptures of God to be the most sublime philosophy.

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

It is the weight, not numbers of experiments that is to be regarded.

Do not the Rays which differ in Refrangibility differ also in Flexibity; and are they not by their different Inflexions separated from one another, so as after separation to make the Colours in the three Fringes above described? And after what manner are they inflected to make those Fringes?