You must preach the Word because (vv.3-4):
People naturally won’t orient to the truth.
People naturally want what feels good to them.
People naturally embrace untruth
You must preach the Word because you are under authority, so (v. 5):
Think clearly.
Endure suffering.
Keep faith in the gospel.
Don’t quit.
You must preach the Word because I can’t (vv. 6-8):
My life and ministry is coming to an end.
My past is now all my past.
My time before my Judge is coming.