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.

All my discoveries have been made in answer to prayer.

I understood. I have understood. I do understand.

'Tis the temper of the hot and superstitious part of mankind in matters of religion ever to be fond of mysteries, and for that reason to like best what they understand least.

If I had stayed for other people to make my tools and things for me, I had never made anything.

You ask me how, with so much study, I manage to retene my health. Morpheus is my last companion; without 8 or 9 hours of him yr correspondent is not worth one scavenger's peruke. My practices did at ye first hurt my stomach, but now I eat heartily enou' as y' will see when I come down beside you.

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