Parental Authority and Tone
The point: Obey commands that come with peculiar mandate from God; it's dangerous to ignore them.
Martin uses the analogy of a parent's command to a child, distinguishing between a sweet command and an immediate, stern command, to illustrate how Paul's adjuration adds a peculiar mandate and implied threat beyond mere apostolic authority.
Anything your mother and father tell you to do comes to you with the full weight of their God-given parental authority. When they smile, when they smile very sweetly and say very singingly, Johnny, come here. No matter how sweet and drippy and gooey they make it, the very fact that it's mama's or papa's lips speaking invests that word with peculiar God-given authority. God has constituted them your heads.
8:37 - 9:04 Read in full sermon