Why does this magnificent applied science which saves work and makes life easier bring us so little happiness? ... The simple answer runs: 'Because we have not yet learned to make sensible use of it.'

On the left-hand side of the field equation we may add the fundamental tensor guv, multiplied by a universal constant, -λ, at present unknown, without destroying the general covariance.

I wouldn't want to live if I did not have my work. In any case, it's good that I'm already old and personally don't have to count on a prolonged future.

The problems that exist in this world can not be solved by the level of thinking that created them.

God did not create evil. Just as darkness is the absence of light, evil is the absence of God.

... knowledge must continually be renewed by ceaseless effort, if it is not to be lost. It resembles a statue of marble which stands in the desert and is continually threatened with burial by the shifting sand. The hands of service must ever be at work, in order that the marble continue to lastingly shine in the sun. To these serving hands mine shall also belong.

Study and, in general, the pursuit of truth and beauty is the sphere in which we are permitted to remain children all our lives." "Study and, in general, the pursuit of truth and beauty is the sphere in which we are permitted to remain children all our lives.