Victorinus of Poetovio
The twenty-four living creatures and the four elders, having harps and golden bowls, sing a new song. The prophecy of the Old Testament, joined with the New, points to the Christian people singing a new song, that is, publicly proclaiming their confession of faith. It is new that the Son of God became man. It is also new that He was delivered to death by men. It is new that He rose on the third day. It is new that He ascended into heaven in the flesh. It is new that He granted men remission of sins. It is new that He set the seal of the Holy Spirit upon men. It is new that they received worship through public supplication and await the Kingdom of endless promises.