Hebrews 1:1–4 teaches that God has spoken to humanity ultimately and completely through His Son, Jesus Christ, who is superior to the prophets and angels.
Paul reveals to Timothy that his life is coming to an end, yet Paul shows how he is at peace. He’s confident he’s lived faithfully and has completed what God has for him. This passage sets a great example for Timothy and the church of how to live a life that counts.
It’s pretty clear, when you read it straight through like the letter was originally written, isn’t it? Preach the Word, preach all scripture, preach doctrine, reproof, correction, righteousness. Paul is reminding and encouraging his student or apprentice, Timothy, what the central calling of his ministry is to stay focused and not sidetracked.