You may be sure that when a man begins to call himself a realist he is preparing to do something that he is secretly ashamed of doing.

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?

Much as a teacher may wince at the thought, he is also an entertainer—for unless he can hold his audience, he cannot really instruct or edify them.

It's odd, and a little unsettling, to reflect upon the fact that English is the only major language in which "I" is capitalized; in many other languages "You" is capitalized and the "i" is lower case." --

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.

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

The difference between faith and superstition is that the first uses reason to go as far as it can, and then makes the jump; the second shuns reason entirely — which is why superstition is not the ally, but the enemy, of true religion.