Only then, approaching my fortieth birthday, I made philosophy my life's work.

When language is used without true significance, it loses its purpose as a means of communication and becomes an end in itself.

All democracies demand common public education because nothing makes people so much alike as the same education.

We must learn to talk with each other, and we mutually must understand and accept one another in our extraordinary differences.

Only then, approaching my fortieth birthday, I made philosophy my life's work.

On the question of the world as a whole, science founders. For scientific knowledge the world lies in fragments, the more so the more precise our scientific knowledge becomes.

What makes us afraid is our great freedom in the face of the emptiness that has still to be filled.