“The message should be clear. God is grieved over our “refined” sins just as He is grieved over sexual immorality or dishonesty. I am not suggesting that being irritable at one’s spouse is as serious as something like adultery. I am saying that being irritable at one’s spouse is sin, and that all sin grieves God and should grieve us” (C.J. Mahanney, Why Small Groups?, p. 14).