In 2 Timothy 2:8-9, Paul writes:
8 Remember Jesus Christ, raised from the dead, descended from David. This is my gospel, 9 for which I am suffering even to the point of being chained like a criminal (NIV, emphases mine)
From my reading of this, Paul's gospel is Jesus Christ, raised from the dead, descended from David. I understand why Jesus rising from the dead would be part of the Gospel, but why include descendant of David? Wouldn't something like Son of God be more important to have in your gospel?