{But the Prince of life ye killed} (	on de arch(8867)on t(8873)
z(9388)s 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  Joh 1:1-18  Col 1:14-20  Heb 1:2f .
Arch(8867)os (arch(885c), beginning, ag(935c), 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 ( Heb 12:2 ). See also  Heb
2:10  Ac 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} (hou h(886d)eis martures
esmen). Of which fact (the resurrection) or of whom as risen,
hou 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.