ACC ~ Romans 15 v12
THE ROOT OF JESSE. AMBROSIASTER: In order to give the Gentiles greater assurance and a surer hope, Paul backs up God’s decree with many examples.
Why is Christ said to be from the root of Jesse and not from the root of Boaz, a righteous man, or of Obed? It is because he is said to be the Son of David on account of the kingdom, and just as he was born of God to be king, so also he was born of David according to the flesh. Therefore, the root of Jesse is the tree of David, which bore fruit on the branch which is the Virgin Mary, who gave birth to Christ. COMMENTARY ON PAUL’S EPISTLES.
IN HIM THE GENTILES SHALL HOPE. PELAGIUS: Jesse was the father of David, from whose seed, through Mary, Christ was born [cf. 1:3]. … It is thus proved to the Jews that their Messiah has already come, because it is clear that all the Gentiles hope in Christ. PELAGIUS’S COMMENTARY ON ROMANS.
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