Persistence is the most powerful force on earth, it can move mountains.

Our entire much-praised technological progress, and civilization generally, could be compared to an axe in the hand of a pathological criminal.

The value of achievement lies in the achieving.

I believe, indeed, that overemphasis on the purely intellectual attitude, often directed solely to the practical and factual, in our education, has led directly to the impairment of ethical values.

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

If the believers of the present-day religions would earnestly try to think and act in the spirit of the founders of these religions then no hostility on the basis of religion would exist among the followers of the different faiths. Even the conflicts and the realm of religion would be exposed as insignificant.

If I were not a physicist, I would probably be a musician. I often think in music. I live my daydreams in music. I see my life in terms of music.