Eternal life is not just never-dying life. Angels live forever, yet they have not what Scripture speaks of as "eternal life." The unsaved live forever under the judgment of God, yet they have not eternal life -see 1 John 5:1212He that hath the Son hath life; and he that hath not the Son of God hath not life. (1 John 5:12).
It is a blessed truth that eternal life is "Christ our life"-see 1 John 1:1,21That which was from the beginning, which we have heard, which we have seen with our eyes, which we have looked upon, and our hands have handled, of the Word of life; 2(For the life was manifested, and we have seen it, and bear witness, and show unto you that eternal life, which was with the Father, and was manifested unto us;) (1 John 1:1‑2).
Possessing Christ as our life, we have now the nature of God with the affections and moral character of that nature. This new life cannot sin. (1 John 3:99Whosoever is born of God doth not commit sin; for his seed remaineth in him: and he cannot sin, because he is born of God. (1 John 3:9).)
The Gospel of John gives "eternal life" manifested in the Son of God.
In the Epistle of John it is that same life manifested in those who are "born of God."
Possessing eternal life, we are thus able to enter into the very thoughts of God Himself. The blessed result is community of thought in "oneness of life."
The Holy Spirit dwelling in us as believers gives the power for our walk; while the Word of God enables us to judge that which would hinder communion.
May we walk carefully-prayerfully-so to enjoy the blessedness of it!
LORD JESUS, 'tis our joy to think
Our life is so bound up with Thine,
That nothing can divide the link
Secured and fixed by love divine.
By faith we see Thee, Lord, enthroned
At God's right hand of power on high;
And Thy redeemed ones, we're owned
As one with Thee, in Thee brought nigh.