Concerning the witness that eternal life is in the Son (not in Adam), in 1 John 5 there seems to be a double testimony: the water and the blood. This witness tells of death, the breach with all of the first man. It was not till Christ was dead that there was cleansing, while the Spirit is the witness of life according to the glory of the second Adam. Life is in the Son, but the Son, as man on the cross, as come in the midst of the old thing, has been rejected and died. He died for atonement and cleansing. But the Son is also glorified man, and as such Head of the new thing in power.
J. N. Darby (adapted)