When I asked a pastor this very question about the possibility of my someday returning to ministry, he quoted Romans 11:29 and then only moments later he made the comment that he "wouldn't support" me but "wouldn't stand in my way." Huh? God's call is either irrevocable or it isn't. When I asked another pastor about it, he suggested that i "go to the foreign mission field where they don't care about that sort of thing." It's a tough one to be sure. This one thing I know: I've never met anyone in any church who had perfectly clean hands and a perfectly pure heart... apart from grace, that it is. It would be nice to think that our mistakes don't forever disqualify us from God's call, but the truth is, whether they do or don't, it is a very long road back if we choose to take it.