Descartes, the father of modern philosophy ... would never-so he assures us-have been led to construct his philosophy if he had had only one teacher, for then he would have believed what he had been told; but, finding that his professors disagreed with each other, he was forced to conclude that no existing doctrine was certain.

The essence of life is doing things for their own sakes.

The dictum that human nature cannot be changed is one of those tiresome platitudes that conceal from the ignorant the depths of their own ignorance.

... the whole world of loneliness, poverty, and pain make a mockery of what human life should be.

No people anywhere in the world would accept being expelled en masse from their own country; how can anyone require the people of Palestine to accept a punishment which nobody else would tolerate?

Dogmatism is the greatest of mental obstacles to human happiness.

It's easy to fall in love. The hard part is finding someone to catch you.