Time is something you can't replace.
If you seek to understand the whole universe you will understand nothing at all but seek to understand yourself and you will understand the whole universe.
Life is like a book with three chapters. Two are already written by God - Birth and Death. The chapter in the middle is empty; fill it with your smile, love and faith.
Democracy is two wolves and a lamb deciding what to have for dinner. Liberty is a well-armed lamb.
If you want to be incrementally better: Be competitive. If you want to be exponentially better: Be cooperative.
Socrates learned to dance when he was seventy because he felt that an essential part of himself had been neglected.