The stupid speak of the past, the wise of the present, and fools of the future.

There are only the wise of the highest class, and the stupid of the lowest class, who cannot be changed.

Man as an individual is a genius. But men in the mass form the headless monster, a great, brutish idiot that goes where prodded.

If A is a success in life, then A equals x plus y plus z. Work is x; y is play; and z is keeping your mouth shut.

Not everything that counts can be counted, and not everything that can be counted counts.

We cannot despair of humanity, since we ourselves are human beings.