The content of scientific theory itself offers no moral foundation for the personal conduct of life.

You are right in speaking of the moral foundations of science, but you cannot turn around and speak of the scientific foundations of morality.

Education is only a ladder to gather fruit from the tree of knowledge, not the fruit itself

It must be conceded that a theory has an important advantage if its basic concepts and fundamental hypotheses are 'close to experience,' and greater confidence in such a theory is certainly justified. There is less danger of going completely astray, particularly since it takes so much less time and effort to disprove such theories by experience. Yet more and more, as the depth of our knowledge increases, we must give up this advantage in our quest for logical simplicity in the foundations of physical theory.

I live in that solitude which is painful in youth, but delicious in the years of maturity.

Overemphasis of the competitive system and premature specialization on the ground of immediate usefulness kill the spirit on which all cultural life depends, specialized knowledge included.

The greatest tragedy of human existence is the illusion of separateness.