Moishe Goldberg was heading out of the Synagogue one day, and as always Rabbi Mendel was standing at the door, shaking hands as the congregation departed. The rabbi grabbed Moishe by the hand, pulled him aside and whispered these words at him: "You need to join the Army of God!"
Moishe replied: "I'm already in the Army of God, Rabbi."
The rabbi questioned: "How come I don't see you except for Rosh Hashanah and Yom Kippur?"
Moishe whispered back: "I'm in the secret service."