Thus, Owen’s great burden and emphasis in helping us to understand what it means to be a Christian is to say: Through the work of the Holy Spirit, the heavenly Father gives you to Jesus and gives Jesus to you. You have Him. Everything you can ever lack is found in Him; all you will ever need is given to you in Him. ‘From his fullness we have all received, grace upon grace.’ For the Father has ‘blessed us in Christ with every spiritual blessings in the heavenly places.’ It is as true for the newest, weakest Christian as for the most mature believer; from the first moment of faith, we are fully, finally, irreversibly justified in Christ.
In this way, like Calvin before him, at a stroke Owen transforms our understanding of the nature of grace and salvation. To explore fellowship with Christ, then, means that we need to explore both ‘the grace of our Lord Jesus Christ’ with whom we have fellowship, and how it is that we have ‘fellowship’ with Him in His grace.
…Since all the fullness of God dwells in Him, and He received the Spirit without measure, His bearing the judgment of God on the cross could not exhaust and destroy Him. Because He is so perfectly suited to our needs, therefore, Christ endears Himself to believers. He is just what we need and He is all that we need:
[Here Ferguson quotes Owen]
There is no man that hath any want in reference unto the things of God, but Christ will be unto him that which he wants.
I speak of those who are given him of his Father. Is he dead? Christ is life. Is he weak? Christ is the power of God, and the wisdom of God. Hath he the sense of guilt upon him? Christ is complete righteousness.…
He hath a fitness to save, having pity and ability, tenderness and power, to carry on that work to the uttermost; and a fulness to save, of redemption and sanctification, or righteousness and the Spirit; and a suitableness to the wants of all our souls.
And so Ferguson concludes:
From beginning to end, therefore, communion with Christ is all about Christ. When He fills the horizon of our vision, we find ourselves drawn to Him, embraced by Him, and beginning to enjoy Him.
Taken from chapter four “Communion with the Son”, in the new book by Sinclair B. Ferguson, The Trinitarian Devotion of John Owen, published by Reformation Trust, 2014 (pp.64-67).