Classical thermodynamics ... is the only physical theory of universal content which I am convinced ... will never be overthrown.

The more I learn, the more I realize I don't know.

Three Rules of Work: Out of clutter find simplicity. From discord find harmony. In the middle of difficulty lies opportunity.

I am a Jew, but I am enthralled by the luminous figure of the Nazarene….No one can read the Gospels without feeling the actual presence of Jesus.

Never let yourself be seduced by any problem, no matter how difficult.

If one asks the whence derives the authority of fundamental ends, since they cannot be stated and justified merely by reason, one can only answer: they exist in a healthy society as powerful traditions, which act upon the conduct and aspirations and judgments of the individuals; they are there, that is, as something living, without its being necessary to find justification for their existence.

People love chopping wood. In this activity one immediately sees results.