Life.....

Do not dwell in the past, do not dream of the future, concentrate the mind on the present moment.

-Buddha

In three words I can sum up everything I've learned about life: it goes on. 

-Robert Frost

A life spent making mistakes is not only more honorable, but more useful than a life spent doing nothing.

George Bernard Shaw

When I stand before God at the end of my life, I would hope that I would not have a single bit of talent left, and could say, 'I used everything you gave me'.

Erma Bombeck

source :

http://www.brainyquote.com/quotes/topics/topic_life.html