"Men love to wonder, and that is the seed of science."

"Science does not know its debt to imagination."

"Polygraph tests are 20th-century witchcraft."

"The distance between insanity and genius is measured only by success."

"Few tragedies can be more extensive than the stunting of life, few injustices deeper than the denial of an opportunity to strive or even to hope, by a limit imposed from without, but falsely identified as lying within."

"Half of the modern drugs could well be thrown out of the window, except that the birds might eat them."

"Evolutionary biology is now uttering and seeking those forces that link us with all those that have being."

"It's going to be a bummer if Mars turns out to be like us."

"The fewer the facts, the stronger the opinion."

"In science, "fact" can only mean "confirmed to such a degree that it would be perverse to withhold provisional assent." I suppose that apples might start to rise tomorrow, but the possibility does not merit equal time in physics classrooms."