Satire is not a social dynamite. But it is a social indicator: it shows that new men are knocking at the door.

The basis for poetry and scientific discovery is the ability to comprehend the unlike in the like and the like in the unlike.

Da Vinci was as great a mechanic and inventor as were Newton and his friends. Yet a glance at his notebooks shows us that what fascinated him about nature was its variety, its infinite adaptability, the fitness and the individuality of all its parts. By contrast what made astronomy a pleasure to Newton was its unity, its singleness, its model of a nature in which the diversified parts were mere disguises for the same blank atoms.

All science is the search for unity in hidden likenesses.

No science is immune to the infection of politics and the corruption of power.

Science is the acceptance of what works and the rejection of what does not. That needs more courage than we might think.

There are two parts to the human dilemma. One is the belief that the end justifies the means. That push-button philosophy, that deliberate deafness to suffering, has become the monster in the war machine. The other is the betrayal of the human spirit: the assertion of dogma that closes the mind, and turns a nation, a civilization, into a regiment of ghosts--obedient ghosts or tortured ghosts.