In Genesis 1:26 the Triune God said, “Let Us make man in Our image.” Man is in God’s image so that man can express God. However, even though man has the image, like a photograph, man still needs the life of God to be God’s living expression.
The created man was set in the garden of Eden with the tree of life (Gen. 2). But man fell into sin and was ejected from the garden (Gen. 3). Through the redemption accomplished by the death of Jesus and the life released in His resurrection, man can now be freed from sin and be born again.
Jesus Christ “the life” (John 14:6) is the reality of the tree of life to become our life. This life is not static, but is a continuous, eternal supply, seen in New Jerusalem as the “river of water of life” (Rev. 22:1) and “the tree of life, producing twelve fruits, yielding its fruit each month” (22:2).
It is by this life that man can express God and thereby cooperate in accomplishing God’s purpose. Examples of the expression of God now are to magnify Christ (Phil. 1:20) and having an excellent manner of life among the unbelievers (1 Peter 2:12).
New Jerusalem, having the glory of God and light like a most precious stone (Rev. 21:11), is the eternal expression of God by means of His life in His redeemed humanity.