This paragraph essentially affirms three propositions, which should function as the overall outline of the sermon. The first proposition has at its heart a mitigated exhortation in v. 1: Christians should not sin = Don’t sin! The two grounds or bases of this appeal are stated in the rest of verse 1 and v. 2.
I. Christians should not sin. But if you do…
A. Jesus is our Advocate when we sin as believers. – (v. 1b).
B. Jesus advocacy for us is based on his being the propitiation for sin. – (v. 2).