It doesn't matter where you've been; what matters is where you're going.

Saint Paul, arguably one of the greatest champions of Jesus Christ, began not merely as an unbeliever, but a strong persecutor of the Faith. In his own words he admits his atrocities. "For you have heard of my former conduct in Judaism, how I persecuted the Church of God beyond measure and tried to destroy it." (Galatians 1.13) If he had remained an unbeliever, there is no telling how many Christians he would have killed. But God had a plan for him to guide the Church rather than kill it. He has a plan for you too. You may have a checkered past. You may not be the most faithful Christian around. You not even think He wants you in the Church. You might, you aren't, but He DOES want you in the Church. You're not alone. St Paul didn't respond immediately either. He said, "I did not immediately confer with flesh and blood, nor did I go up to Jerusalem to those who were apostles before me....then after three years I went up to Jerusalem to see Peter, and remained with him fifteen days." (Galatians 1.16-18) The issue isn't whether or not you have always been faithful. God is calling you to repentance just as He called Saint Paul. Will you keep denying His call, or will you accept His invitation to begin a new life in Christ, where you can leave the old behind.