To... see. Literally They shall see (App-133) to whom it was not (App-105) reported.
He. concerning (App-104) Him.
spoken. Greek. anangello. Compare Acts 14:27; 1 Peter 1:12.
understand. See Romans 3:11. From Isaiah 52:15.
Related Commentaries of Romans 15:21
Romans 15:21
21 But as it is written, To whom he was not spoken of, they shall see: and they that have not heard shall understand.