Facts do not 'speak for themselves'; they are read in the light of theory.

The proof of evolution lies in those adaptations that arise from improbable foundations.

I can envision observations and experiments that would disprove any evolutionary theory I know.

I am not, personally, a believer or a religious man in any sense of institutional commitment or practice. But I have a great respect for religion, and the subject has always fascinated me, beyond almost all others (with a few exceptions, like evolution and paleontology).

Change is more often a rapid transition between two stable states than a continuous transformation at slow and steady rates. . . .Change occurs in large leaps following a slow accumulation of stress that a system resists until it reaches the breaking point. Heat water, and it eventually boils. Oppress the workers more and more and bring on the revolution.

Theory-free science makes about as much sense as value-free politics.

We pass through this world but once.