A table, a chair, a bowl of fruit and a violin; what else does a man need to be happy.

I don't know what weapons will be used in the Third World War. But I can tell you what they'll use in the Fourth - rocks!

Do you believe in immortality? No, and one life is enough for me.

Mathematics deals exclusively with the relations of concepts to each other without consideration of their relation to experience.

You are the only person I know who has the same attitude towards physics as I have: belief in the comprehension of reality through something basically simple and unified... It seems hard to sneak a look at God's cards. But that He plays dice and uses 'telepathic' methods... is something that I cannot believe for a single moment.

The ideals which have always shone before me and filled me with the joy of living are goodness, beauty, and truth. To make a goal of comfort or happiness has never appealed to me; a system of ethics built on this basis would be sufficient only for a herd of cattle.

If I were wrong, wouldn't one be enough?