For I know the thoughts that I think toward you, saith the Lord, thoughts of peace and not of evil, to give you an expected end.

Even before we were born God knew our calling in life. We had value even before we did anything. Let go of the things from your past that are holding you back from your future. Don't be afraid to let God use you. Living out your calling isn't just what you do but also how you live.
Acts 9:1-15 talks about Sauls past. Even though Saul, or as we know him Paul, killed many Christians God used him to preach to His people. Your past doesn't disqualify you from your calling. Be willing to do what God is calling you to do. Your vision determines your future!
 
-Karen Pelletier