"The air pump is a philosophical instrument, not a toy."

"I have seen a piece of glowing wood continue to shine in a vacuum, proving that not all light requires air."

"I have always been of the opinion, that the best way to convince men of their errors, is to lay before them a clear and distinct view of the truth."

"I have always preferred the plainness of truth to the ornaments of eloquence."

"I would rather be thought a good experimenter than a subtle reasoner."