What is Life ?

What is Life?  Why are we here? Is there any purpose or should we follow the philosophy of eating, working, sleeping and repeating it? I know, most of us will not even get the time to think about it, leave aside finding the solution of the little Mystery called "LIFE".

A few days back I was reading a book name "Sophie's world". The book lucidly captured the essence of 2000 years old philosophy.