Hebrews 1:1-4.
Writing a word of encouragement and clear warning, the Author of Hebrews calls his audience to know and trust that Jesus is better than anything this world can offer. These professing Christians needed to be reminded of this as they were in danger of giving up because times were hard as persecution increased and suffering was a present reality. So to spur them on to not shrink back from their confession of faith in Jesus, the Author writes this brief word of exhortation we know as Hebrews. This is a practical book of the Bible because we need this same encouragement and warning as well.