I believe that we don't need to worry about what happens after this life, as long as we do our duty here-to love and to serve.

The scientific theorist is not to be envied. For Nature, or more precisely experiment, is an exorable and not very friendly judge of his work. It never says "yes" to a theory. In the most favorable cases it says "Maybe," and in the great majority of cases simply "No." If an experiment agrees with a theory it means for the latter "Maybe," and if it does not agree it means "No." Probably every theory will some day experience its "No" - most theories, soon after conception.

From the standpoint of daily life, however, there is one thing we do know: that we are here for the sake of each other.

Solitude is painful when one is young, but delightful when one is more mature.

I asked myself childish questions and proceeded to answer them.

Art is the expression of the profoundest thoughts in the simplest way.

I have never obtained any ethical values from my scientific work.