If there were in the world today any large number of people who desired their own happiness more than they desired the unhappiness of others, we could have a paradise in a few years.

Why is propaganda so much more successful when it stirs up hatred than when it tries to stir up friendly feeling?

Brief and powerless is man's life; on him and all his race the slow, sure doom falls pitiless and dark.

All the conditions of happiness are realized in the life of the man of science.

In all affairs it's a healthy thing now and then to hang a question mark on the things you have long taken for granted.

Unfortunately, however, power is sweet, and the man who in the beginning seeks power merely in order to have scope for his benevolence is likely, before long, to love the power for its own sake.

Collective wisdom, alas, is no adequate substitute for the intelligence of individuals. Individuals who opposed received opinions have been the source of all progress, both moral and intellectual. They have been unpopular, as was natural.