In my view all salvation for philosophy may be expected to come from Darwin's theory

Which is more remarkable fact about America: that millionaires are idealists or idealists become millionaires.

The most ordinary things are to philosophy a source of insoluble puzzles. With infinite ingenuity it constructs a concept of space or time and then finds it absolutely impossible that there be objects in this space or that processes occur during this time . . . the source of this kind of logic lies in excessive confidence in the so-called laws of thought.

Since a given system can never of its own accord go over into another equally probable state but into a more probable one, it is likewise impossible to construct a system of bodies that after traversing various states returns periodically to its original state, that is a perpetual motion machine.

Bring forward what is true, Write it so that it is clear, Defend it to your last breath!

Nothing is more practical than a good theory.

Thermodynamics, correctly interpreted, does not just allow Darwinian evolution; it favors it.