“The facts of nature are what they are, but we can only view them through the spectacles of our mind. Our mind works largely by metaphor and comparison, not always (or often) by relentless logic. Wh...”

“We pass through this world but once. 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 imp...”

“We have become, by the power of a glorious evolutionary accident called intelligence, the stewards of life's continuity on earth. We did not ask for this role, but we cannot abjure it. We may not b...”

“Skepticism is the agent of reason against organized irrationalism--and is therefore one of the keys to human social and civic decency.”

“We reveal ourselves in the metaphors we choose for depicting the cosmos in miniature.”

“We are the offspring of history, and must establish our own paths in this most diverse and interesting of conceivable universesone indifferent to our suffering, and therefore offering us maximum fr...”

“I do not know what I may appear to the world, but to myself I seem to have been only like a boy playing on the sea-shore, and diverting myself in now and then finding a smoother pebble or a prettie...”

“To know the history of science is to recognize the mortality of any claim to universal truth. ”

“The scientist only imposes two things, namely truth and sincerity, imposes them upon himself and upon other scientists.”