To sell oneself for thirty pieces of silver is an honest transaction; but to sell oneself to one s own conscience is to abandon mankind.

The jester is brother to the sage.

History knows no scruples and no hesitation. Inert and unerring, she flows towards her goal. At every bend in her course she leaves the mud which she carries and the corpses of the drowned.

The evolution of the brain not only overshot the needs of prehistoric man, it is the only example of evolution providing a species with an organ which it does not know how to use.

The discoveries of yesterday are the truisms of tomorrow, because we can add to our knowledge but cannot subtract from it.

The purposiveness of all vital processes, the strategy of the genes and the power of the exploratory drive in animal and man, all seem to indicate that the pull of the future is as real as the pressure of the past.

Some of the greatest discoveries...consist mainly in the clearing away of psychological roadblocks which obstruct the approach to reality; which is why,post factum they appear so obvious.