First of all, when did I ask for extra payment? And what mechanic has never EVER made a slight mistake on the job? A family friend is a mechanic and he does make mistakes now and then, but he corrects them with his own time and effort.
Same thing with us preachers; we understand we're not perfect while trying to be as good at what we do as possible. I will make mistakes at what I do. You think you'll never mess up whatever art that catches your interest? Part of immersing yourself in an art is becoming better at it. If you agree you have improved, you agree there were imperfections that you have corrected to a certain degree, and I'm sure there's more that you're working on these days.
"...are you SURE thats your calling? "
I'm sure I want to do this. Preachin' isn't for everyone, somebody's gotta do it. That somebody's me; please stick to the arguement without pulling the 'are you sure' card.
Wanna feel God? Step onto the wrestling mat and you'd be crazy to deny the uplifting spirit.