"Gravity must be caused by some agent acting constantly according to certain laws; but whether this agent be material or immaterial, I have left to the consideration of my readers."

"I consider my experiments as a kind of play."

"I consider the world as a stage, and the actions of men as a play, in which every one acts a part."

"I have a fundamental belief in the Bible as the Word of God, written by those who were inspired. I study the Bible daily."

"The light which comes from the sun, and from all fire, consists of all the primary colours mixed together."