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.

If the creator has a purpose in equipping us with a neck, he surely would have meant for us to stick it out.

Habit is the denial of creativity and the negation of freedom; a self-imposed straitjacket of which the wearer is unaware.

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.

One question that people always ask at home is never asked here: "What happened to Communism in Russia?" Everybody yawns when a visitor brings it up, because the answer is so obvious to every Russian. The answer is that there never was Communism in Russia; there were only communists.

...the temptation, which consisted of a single word written on the cemetary of the defeated: Sleep.

In the pun, two strings of thought are tangled into one acoustic knot.