A Simple Truth:
Purpose begins with understanding who God created you to be.
For God's gifts and his call are irrevocable. Romans 11:29
I don't know that I have ever really paused and thoroughly considered what this verse means. I hope you will stop and allow this verse to soak in for you too. God has given you gifts and a calling on your life - that he will never take away - they are irrevocable! He will never change his mind about the gift He's given you or the call on your life just because you messed up or didn't do something good enough.