I'm doubling up here on the A-Z because clearly, I'm failing at being faithful to post daily. I knew it would be hard - that's probably why they called it a 'challenge'....
There seem to be many definitions of the word purpose, books on the subject, how to find it, get it, give your life it, etc, etc. As a Christian, I think my purpose in life can be easily summed up in the words of the Westminster Shorter Catechism:
Question: "What is the chief end of man?"
Answer: "Man's chief end is to glorify God and enjoy Him forever."
(Oh, and see how I slipped in the quote right there...yeah...I'm sly like that) :)