I will declare the decree] To shew that my vocation to the kingdom is of God. the decree] Or, for a decree. Thou art my son] Acts 13:33. Hebrews 1:5. this day have I begotten thee] David was declared king, and so Gods son by adoption, 1 Samuel 16:12. Christ incarnate was declared to be Gods son by nature, Matthew 3:17. Acts 13:33. Hebrews 1:5. and Hebrews 5:5.