John 14:20

In that day ye shall know that I am in my Father, and ye in me, and I in you.

Here is the whole prospectus of God's kingdom in embryo, making this verse rank with Genesis 3:15 as a statement of the whole plan of salvation. Here is the achievement of God's righteousness, the secret of justification, and the basis of the redeemed's avoidance of judgment - the whole works; it's all here!

Ye in me ... God's way of accounting men righteous is that of totally identifying them with Jesus Christ who is righteous. The righteousness God imputes to men is a genuine righteousness, a total and absolute perfection, achieved by Jesus Christ and made available to men "in him." Any so-called "righteousness" based upon anything else is spurious. Nothing that a sinner might either believe or do could make either his faith or his actions the grounds of his being accounted righteous in the sight of God. "All spiritual blessings are in Christ" (Ephesians 1:3). God therefore makes a sinner righteous by bringing him into Christ, identifying him with Christ and as Christ, thus enabling all the righteousness of the Holy One to be in fact the righteousness of the redeemed soul in Christ (Galatians 2:20). For full discussion of justification in Christ, see my Commentary on Romans, pp. 108-113.

No man can be saved as John Doe, Joe Bloke, or whoever he is. The only way any man can be saved is as Christ and in Christ. The identification of believers with Christ is revealed in this verse to be exactly the same as the identification of Christ with God. God is in Christ; Christ is in God; Christ is in Christians; and Christians are in Christ. The loss of personal identity for purposes of procuring justification was what Jesus referred to in "He that loseth his life for my sake shall find it" (Matthew 10:39).