Jamieson, Fausset and Brown on Acts 5:31

31. Prince and a Saviour--the first word expressing that Royalty which all Israel looked for in Messiah, the second the Saving character of it which they had utterly lost sight of. Each of these features in our Lord's work enters into the other, and both make one glorious whole (compare Ac 3:15; He 2:10).

to give--dispensing as a "Prince."

repentance and remission of sins--as a "Saviour"; "repentance" embracing all that change which issues in the faith which secures "forgiveness" (compare Ac 2:38; 20:21). How gloriously is Christ here exhibited; not, as in other places, as the Medium, but as the Dispenser of all spiritual blessings!