“None can reply - all seems eternal now. The wilderness has a mysterious tongue, which teaches awful doubt.”

“When I view all beings not as special creations, but as the lineal descendants of some few beings which lived long before the first bed of the Cambrian system was deposited, they seem to me to beco...”

“If I had my life to live over again, I would have made a rule to read some poetry and listen to some music at least once every week.”

“A man who dares to waste one hour of time has not discovered the value of life.”

“Thus, from the war of nature, from famine and death, the most exalted object which we are capable of conceiving, namely, the production of the higher animals, directly follows. There is grandeur in...”

“We are not here concerned with hopes or fears, only with truth as far as our reason permits us to discover it.”

“The race is now on between the technoscientific and scientific forces that are destroying the living environment and those that can be harnessed to save it. . . . If the race is won, humanity can e...”

“None can reply - all seems eternal now. The wilderness has a mysterious tongue, which teaches awful doubt.”

“When Mother Nature speaks, even the Gods hold silence.”

“Everybody liked better to conjecture how the thing was, than simply to know it; for conjecture soon became more confident than knowledge, and had a more liberal allowance for the incompatible.”

“From this point forth, we shall be leaving the firm foundation of fact and journeying together through the murky marshes of memory into thickets of wildest guesswork.”

“Fundamental values (such as equality and human rights) should not be held hostage to some factual conjecture about blank slates that might be refuted tomorrow.”