But speaking the truth in love, may grow up into him in all things, which is the head, even Christ:
Speaking the truth, х aleetheuontes (G226)] - 'holding' or 'following the truth:' opposed to 'error' or 'deceit' (Ephesians 4:14).
In love - in contrast to "in craftiness;" spurious professions of love by crafty teachers of error. "Truth" is never to be sacrificed to so-called 'charity;' yet is to be maintained in charity. Truth in word and act, love in manner and spirit (cf. Ephesians 4:21; Ephesians 4:24).
Grow up - from the state of "children" to be 'full-grown men.' There is growth only in the spiritually alive, not in the dead.
Into him - so as to be more and more incorporated, and become one with Him.
In all things, х ta (G3588) panta (G3956)] - 'in all the elements of our growth' (Ellicott).
The head (Ephesians 1:22).