"We don't know a millionth of one percent about anything."

"To Monsieur Eiffel the Engineer, the brave builder of so gigantic and original a specimen of modern Engineering from …"

"During all those years of experimentation and research, I never once made a discovery. All my work was deductive, and…"

"The doctor of the future will give no medicine, but will instruct his patient in the care of the human frame, in diet…"

"X-rays ... I am afraid of them. I stopped experimenting with them two years ago, when I came near to losing my eyesig…"

"Hell! There ain't no rules around here! We are tryin' to accomplish somep'n!"

"Genius is one percent inspiration, ninety-nine percent perspiration."

"Nature is what we know. We do not know the gods of religions. And nature is not kind, or merciful, or loving. If God …"

"Some day some fellow will invent a way of concentrating and storing up sunshine to use instead of this old, absurd Pr…"

"If our nation can issue a dollar bond, it can issue a dollar bill. The element that makes the bond good, makes the bi…"