Do not worry about your difficulties in Mathematics. I can assure you mine are still greater.

The ideals which have always shone before me and filled me with the joy of living are goodness, beauty, and truth.

Gravitation cannot be held responsible for people falling in love. How on earth can you explain in terms of chemistry and physics so important a biological phenomenon as first love? Put your hand on a stove for a minute and it seems like an hour. Sit with that special girl for an hour and it seems like a minute. That's relativity.

The world is not full of evil because of those who do wrong. It is full of evil because of those who do nothing.

I see in Nature a magnificent structure... that must fill a thinking person with a feeling of humility.

I do not believe that civilization will be wiped out in a war fought with the atomic bomb. Perhaps two-thirds of the people of the earth will be killed.

Rejoice with your family in the beautiful land of life.