“To speak of Christ’s love as ‘surpassing knowledge’ means that it is so great that one can never know it fully. We can never plumb its depths or comprehend its magnitude. No matter how much we know of the love of Christ, how fully we enter into His love for us, there is always more to know and experience.
And the implication, in the light of the following words, is that we cannot be as spiritually mature as we should be unless we are empowered by God to grasp the limitless dimensions of the love of Christ.”
–Peter T. O’Brien, The Letter to the Ephesians, PNTC (Grand Rapids: Eerdmans, 1999), 264.
“Almost all men are infected with the disease of desiring useless knowledge. It is of great importance that we should be told what is necessary for us to know, and what the Lord desires us to contemplate, above and below, on the right hand and on the left, before and behind.
The love of Christ is held out to us as the subject which ought to occupy our daily and nightly meditations, and in which we ought to be wholly immersed. He who holds in possession of this alone, has enough.
Beyond it there is nothing solid, nothing useful– nothing, in short, that is right or sound. Go abroad in heaven and earth and sea, you will never go beyond this without overstepping the lawful bounds of wisdom.”
–John Calvin, Commentaries on the Epistles of Paul the Apostle to the Galatians, Ephesians, Philippians, and Colossians, trans. T.H.L. Parker (Grand Rapids: Eerdmans, 1965), 169. Calvin is commenting on Ephesians 3: 18-19.