A Puritan Theology: Doctrine for Life in a Year:
[Sinclair] Ferguson wrote that in [John] Owen’s theology, “the Christian life is nothing less than fellowship with God the Trinity, leading to the full assurance of faith.” What did Owen mean by communion or fellowship with God? It is the mutual exchange of spiritual benefits between God and His people on the bond between them in Christ. Owen wrote,
“Now, communion is the mutual communication of such good things as wherein the persons holding that communion are delighted, bottomed upon some union between them….Our communion, then, with God consisteth in his communication of himself to us, with our returnal unto him or that which he requireth and accepteth, flowing from that union which in Jesus Christ we have with him.”
(A Puritan Theology, p. 102-103)