It takes a different kind of thinking to solve a problem than the kind of thinking which produced the problem.

Concern for man and his fate must always form the chief interest of all technical endeavors. Never forget this in the midst of your diagrams and equations.

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.

Mankind must give up war in the Atomic Era. What is at stake is the life or death of humanity.

He who has never been deceived by a lie does not know the meaning of bliss.

The only thing more dangerous than ignorance is arrogance

A hundred times every day I remind myself that my inner and outer life are based on the labors of others.