A culture must be reasonably stable, but it must also change, and it will presumably be strongest if it can avoid excessive respect for tradition and fear of novelty on the one hand and excessively rapid change on the other.

A person's genetic endowment, a product of the evolution of the species, is said to explain part of the workings of his mind and his personal history the rest.

If freedom is a requisite for human happiness, then all that’s necessary is to provide the illusion of freedom.

We have not yet seen what man can make of man.

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.

Old age is rather like another country. You will enjoy it more if you have prepared yourself before you go.