The biggest problem is not to let people accept new ideas, but to let them forget the old ones.

The disruptive powers of excessive national fecundity may have played a greater part in bursting the bonds of convention than either the power of ideas or the errors of autocracy.

For at least another hundred years we must pretend to ourselves and to every one that fair is foul and foul is fair; for foul is useful and fair is not. Avarice and usury and precaution must be our gods for a little longer still.

It's not bringing in the new ideas that's so hard; it's getting rid of the old ones.

The businessman is only tolerable so long as his gains can be held to bear some relation to what, roughly and in some sense, his activities have contributed to society.

It would not be foolish to contemplate the possibility of a far greater progress still.

I can't remember my telephone number, but I know it was in the high numbers.