Nothing is more dangerous than a dogmatic worldview.

Honorable errors do not count as failures in science, but as seeds for progress in the quintessential activity of correction.

Theory and fact are equally strong and utterly interdependent; one has no meaning without the other. We need theory to organize and interpret facts, even to know what we can or might observe. And we need facts to validate theories and give them substance.

What you see is that the most outstanding feature of life's history is a constant domination by bacteria.

Pictures are not incidental frills to a text; they are essences of our distinctive way of knowing.

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

Death is the ultimate enemy - and I find nothing reproachable in those who rage mightily against the dying of the light.