The message is God’s speech through his Son (Hebrews 1:2). When God’s final word has been spoken to us by his Son, we must also give the greatest attention to that message. Hebrews 2:1–4 expresses explicitly what was said implicitly in Hebrews 1:1–4, that is, the message of God’s highest Emissary makes us responsible in the highest measure.1
1 Therefore we must pay much closer attention to what we have heard, lest we drift away from it.