Five hundred years before Christ was born, the Greek philosopher Heraclitus told his students that everything changes except the law of change. He said: You cannot step in the same river twice. The river changes every second; and so does the man who stepped in it. Life is a ceaseless change. The only certainty is today. Why mar the beauty of living today by trying to solve the problems of a future that is shrouded in ceaseless change and uncertainty-a future that no one can possibly foretell?
- Dale Carnegie
Again, it is harder to fight with pleasure than with anger, to use Heraclitus' phrase', but both art and virtue are always concerned with what is harder;