What a person thinks on his own without being stimulated by the thoughts and experiences of the other people is even in the best case rather paltry and monotonous.

I have just got a new theory of eternity.

Everyone has two choices. We're either full of love... or full of fear.

Raffiniert ist der Herr Gott, aber boshaft ist er nicht. God is subtle, but he is not malicious.

My scientific work is motivated by an irresistible longing to understand the secrets of nature not by other feelings.

If only I had known, I should have become a watchmaker.

Everything has changed, except our way of thinking.