Why are we willing to accept a new mathematical formula we don't understand as the product of a brilliant mind, while rejecting a new art form we don't understand as the product of a deranged mind?

Intolerance is the most socially acceptable form of egotism, for it permits us to assume superiority without personal boasting.

Between the semi-educated, who offer simplistic answers to complex questions, and the overeducated, who offer complicated answers to simple questions, it is a wonder that any questions get satisfactorily answered at all.

The pessimist sees only the tunnel; the optimist sees the light at the end of the tunnel; the realist sees the tunnel and the light - and the next tunnel.

When we inform, we lead from strength; when we communicate, we lead from weakness—and it is precisely this confession of mortality that engages the ears, heads and hearts of those we want to enlist as allies in a common cause.

History repeats itself, but in such cunning disguise that we never detect the resemblance until the damage is done.

Many people know how to work hard; many others know how to play well; but the rarest talent in the world is the ability to introduce elements of playfulness into work, and to put some constructive labor into our leisure.