At the first session of a conversion class...
At the first session of a conversion class the minister conducting the class asked, "What must we do before we can expect forgiveness from sin?" After a long silence, one of the men in attendance raised his hand and said: "Sin?"

A doctor is complaining to a mechanic
A doctor is talking to a car mechanic, "Your fee is several times more per hour then we get paid for medical care."

"Yeah, but you see, doc, you have always the same model, it hasn't changed since Adam; but we have to keep up to date with new models coming every month."