that a man should not have any intent when serving G-d, other than to do the will of G-d, that G-d said, and one is doing His will. This itself is the reward and punishment, as written: "For his anger endures but for a moment; life results from His favor" (Tehilim 30:6). This was explained earlier in a few places. If a man has any other intent besides this, he is serving himself not G-d alone. He is like a bad servant who hopes for favors from his master.