Charles Hodge on Ephesians 4:15

V. 15. These remarks are not foreign to the subject; for the apostle, while condemning all instability with regard to faith, and while denouncing the craft of false teachers, immediately adds the injunction to adhere to the truth in love. It is not mere stability in sound doctrine, but faith as combined with love that he requires. The only saving, salutary faith is such as works by love and purifies the heart.

Ἀληθεύοντες δὲ ἐν ἀγάπῃ our version renders "but speaking the truth in love." But this does not suit the context. This clause stands opposed to what is said in verse 14. We are not to be children driven about by every wind of doctrine, but we are to be steadfast in professing and believing the truth. This interpretation which is demanded by the connection is justified by the usage of the word ἀληθεύειν, which means not only to speak the truth, but also to be ἀληθής in the sense of being open, upright, truthful, adhering to the truth. And the truth here contemplated is the truth of God, the truth of the Gospel, which we are to profess and abide by. The words ἐν ἀγάπῃ are commonly and properly connected with ἀληθεύοντες, "professing the truth in love." They may however be connected with the following word, so as to give the sense, "let us increase in love." But this leaves the participle too naked, and is not indicated by the position of the words. Besides, in the next verse, which is part of the same sentence, we have αὔξησιν ποιεῖται εἰς οἰκοδομὴν, εν ἀγάπῃ, which would be a needless repetition of the same idea.

We are "to grow up into (rather unto) him," εἰς αὐτόν. This is to be explained by a reference to the expressions εἰς ἄνδρα τέλειον, εἰς μέτρον ἡλικίας, κτλ. in v. 13. These are different forms of expressing the idea that conformity to Christ is the end to be attained. We are to grow so as to be conformed to him, τὰ πάντα, as to all things. Him, "who is the head, viz. Christ." We are to be conformed to our head—because he is our head, i. e. because of the intimate union between him and us. The slight confusion in the metaphor which presents Christ as the model to which we are to be conformed, and the head with whose life we are to be pervaded, is no serious objection to this interpretation, which is demanded by the context.