Another Guide

The Ephesians had, through grace, been brought out of this state of things. They had another guide, as widely removed from mere natural conscience on the one side as from law on the other. The Apostle says in Eph. 4:20-24:
Ye have not so learned Christ; if so be that ye have heard Him, and have been taught by Him, as the truth is in Jesus: that ye put off concerning the former conversation the old man, which is corrupt according to the deceitful lusts; and be renewed in the spirit of your mind; and that ye put on the new man, which after God is created in righteousness and true holiness [holiness of truth].
These Ephesians had learned not law but Christ. They had by faith heard Him and been taught by-or rather in-Him, according to the truth of which His own life as man had been the perfect and divine manifestation. The truth as it is in Jesus does not mean the doctrinal truth of salvation, but the perfect, holy walk of truth as shown in His Person, for when Jesus is spoken of in this way, it refers to His life and walk here in the world.