On the other hand, the concept owes its meaning and its justification exclusively to the totality of the sense impressions which we associate with it.

Capitalism has brought with it progress, not merely in production but also in knowledge.

Whatever there is of God and goodness in the universe, it must work itself out and express itself through us. We cannot stand aside and let God do it.

You see, wire telegraph is a kind of a very, very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? And radio operates exactly the same way: you send signals here, they receive them there. The only difference is that there is no cat.

A person starts to live when he can live outside himself.

If tomorrow were never to come, it would not be worth living today.

I have always disliked the fierce competitive spirit embodied in that highly intellectual game.