Each problem that I solved became a rule which served afterwards to solve other problems.
To a wise and good man the whole earth is his fatherland.
Convictions are more dangerous enemies of truth than lies.
Gravity is only the bark of wisdom's tree; but it preserves it
There are no limitations to the mind except those we acknowledge.
The greatest of all mistakes is to do nothing because you think you can only do a little
Every intelligent individual wants to know what makes him tick, and yet is at once fascinated and frustrated by the fact that oneself is the most difficult of all things to know.
Yesterday is but today's memory and tomorrow is today's dream.
If you have no problems, then you have no clue to what is going.
Men build too many walls and not enough bridges.
It seems essential, in relationships and all tasks, that we concentrate only on what is most significant and important.
I've learned that people will forget what you said, people will forget what you did, but people will never forget how you made them feel.
Real knowledge is to know the extent of one's ignorance.
I believe that one defines oneself by reinvention. To not be like your parents. To not be like your friends. To be yourself. To cut yourself out of stone.
To me, being an intellectual doesn't mean knowing about intellectual issues; it means taking pleasure in them.
Thought can be so seductive and hypnotic that it absorbs your attention totally, so you become your thoughts.
If you don't behave as you believe, you will end by believing as you behave.
Nature is pleased with simplicity. And nature is no dummy
Learned we may be with another man's learning: we can only be wise with wisdom of our own.
It is necessary to keep one's compass in one's eyes and not in the hand, for the hands execute, but the eye judges.
Work is the price which is paid for reputation.