Man is not sum of what he has already, but rather the sum of what he does not yet have, of what he could have.

I want to make a dent in the universe.

Show me a thoroughly satisfied man, and I will show you a failure.

Without some goals and some efforts to reach it, no man can live.

No act of kindness, no matter how small, is ever wasted.

Only those who attempt the absurd can achieve the impossible.

A great obstacle to happiness is to expect too much happiness