Do not intervene between a person and the consequences of their own behavior.

Science is a willingness to accept facts even when they are opposed to wishes.

Overcrowding can be corrected only by inducing people not to crowd, and the environment will continue to deteriorate until polluting practices are abandoned.

The problem of far greater importance remains to be solved. Rather than build a world in which we shall all live well, we must stop building one in which it will be impossible to live at all.

It is a mistake to suppose that the whole issue is how to free man. The issue is to improve the way in which he is controlled.

Each of us has interests which conflict the interests of everybody else... 'everybody else' we call 'society'. It's a powerful opponent and it always wins. Oh, here and there an individual prevails for a while and gets what he wants. Sometimes he storms the culture of a society and changes it to his own advantage. But society wins in the long run, for it has the advantage of numbers and of age.

If you're old, don't try to change yourself, change your environment.