Therefore, the causes assigned to natural effects of the same kind must be, so far as possible, the same.

To explain all nature is too difficult a task for any one man or even for any one age

If I have seen further than others, it is by standing upon the shoulders of giants.

Every particle of matter is attracted by or gravitates to every other particle of matter with a force inversely proportional to the squares of their distances.

The great ocean of truth lay all undiscovered before me.

Because of Diamond, I have had to begin much of the work afresh. I will not, however, rid myself of her, nor even punish her. She knew not what she was doing, and that which she did was for my protection and for love of my person. Her place remains at my side or against my feet when I lie abed.

The Synthesis consists in assuming the Causes discovered and established as Principles, and by them explaining the Phænomena proceeding from them, and proving the Explanations.