Do not confuse your vested interests with ethics. Do not identify the enemies of your privilege with the enemies of humanity.

There is a hate layer of opinion and emotion in America. There will be other McCarthys to come who will be hailed as its heroes.

Every step by which men add to their knowledge and skills is a step also by which they can control other men.

The real sadness of fifty is not that you change so much but that you change so little.

The taste of democracy becomes a bitter taste when the fullness of democracy is denied.

It is not science that has destroyed the world, despite all the gloomy forebodings of the earlier prophets. It is man who has destroyed man.

The problem of freedom in America is that of maintaining a competition of ideas, and you do not achieve that by silencing one brand of idea.