The apostle Peter, at Acts 3:15, called Jesus "the Chief Agent [Greek archegos, "Prince", King James Bible] of life". Why ? Because only through God's Son, Jesus Christ, and no one else, is there the hope of "everlasting life"(1 John 5:11), whether in heaven as "kings and priests" (Rev 5:9 10) or on the earth in a Paradise.(Luke 23:43) Jesus himself said that "the Father loves the Son and has given all things into his hand. He that exercises faith in the Son has everlasting life; he that disobeys the Son will not see life, but the wrath of God remains upon him."(John 3:35, 36)
Peter later told the high priest and those in the Sanhedrin, that "the God of our forefathers raised up Jesus, whom you slew, hanging him upon a stake. God exalted this one as Chief Agent and Savior to his right hand, to give repentance to Israel and forgiveness of sins."(Acts 5:31) Thus, because of Jesus obedience until death, was "exalted...as Chief Agent and Savior" to God's right hand.
The Greek term (archegos) here used means, basically, “chief leader,” a related word (Greek archon) being applied to Moses (Acts 7:27, 35) as “ruler” in Israel. Hence, as the “chief leader” or “pioneer of Life” (Moffett), Jesus Christ introduced a new and essential element for gaining eternal life in the sense of being an intermediary or go-between, but he is such in an administrative sense as well.
He is God’s High Priest who can effect full cleansing from sin and liberation from sin’s death-dealing effects (Heb 3:1, 2; 4:14; 7:23-25; 8:1-3); he is the appointed Judge into whose hands all judgment is committed, so that he judiciously administers his ransom benefits to individuals among mankind according to their worthiness to live under his kingship (John 5:22-27; Acts 10:42, 43); through him the resurrection of the dead also comes. (John 5:28, 29; 6:39, 40)
Because God so ordained to use his Son, “there is no salvation in anyone else, for there is not another name under heaven that has been given among men by which we must get saved.”(Acts 4:12) Thus, "he that has the Son (or exercises faith in the Son) has this life; he that does not have the Son of God (or fails to exercise faith in Jesus like the nation of fleshly Israel) does not have this life."(1 John 5:12)
