Commentaries:
Robertson's Word Pictures (NT)
But the Prince of life ye killed (ton de arxhgon thv zwhv apekteinate). "The magnificent antithesis" (Bengel) Peter here draws between their asking for a murderer and killing the Prince (or Author) of life. Peter pictures Jesus as the source of all life as is done in John 1:1-18; Colossians 1:14-20; Hebrews 1:2 f. Arxhgov (arxh, beginning, agw, to lead) is an adjective "furnishing the first cause or occasion" in Euripides, Plato. Thence substantive, the originator, the leader, the pioneer as of Jesus both Beginner and Finisher (Hebrews 12:2). See also Hebrews 2:10; Acts 5:31 where it is applied to Jesus as "Prince and Saviour." But God raised him from the dead in contrast to what they had done.
Whereof we are witnesses (ou hmeiv marturev esmen). Of which fact (the resurrection) or of whom as risen, ou having the same form in the genitive singular for masculine or neuter. Peter had boldly claimed that all the 120 have seen the Risen Christ. There is no denial of that claim.
Other Robertson's Word Pictures (NT) entries containing Acts 3:15:
Acts 1:3
Acts 5:31
Acts 13:31
Hebrews 2:10
1 Peter 5:1
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