Among the various designations which the apostle Paul (the apostle of spiritual fulness) took for himself, was the designation ‘herald’. The word is not so translated in our versions, unfortunately, but wherever you find the word ‘preacher’ or ‘preaching’ or ‘preached’ you have in the original the word ‘herald’, ‘heralding’. Paul actually called himself that in both of his letters to Timothy, once in each. “I was appointed a herald” (1 Tim. 2:7); “Whereunto I was appointed a herald” (2 Tim. 1:11). Our version is ‘a preacher’, and the original idea of the herald was one who was called upon to make an official proclamation. He might be sent by the king to make a royal proclamation, or by a prince or by a magistrate or by a military governor, but it was an official proclamation he was called upon to make. Paul used that word in 2 Cor. 4:5: “We preach not ourselves, but Christ Jesus as Lord”, “we herald Christ Jesus as Lord”, “we make the proclamation that Christ Jesus is Lord”, and the herald made his proclamation, and he did not ask anybody if they would accept what he announced; he did not make it optional at all. You can do what you like about it. You have to recognise this fact. What you do is your responsibility. This is God’s fact. “God has made Him both Lord and Christ, this Jesus whom you crucified” (Acts 2:36).
All that is meant by Christ as absolute Lord in the appointment of God, in Headship, the Head of every man, the Head of the creation, and Head over all things to the church - all that which we have not yet ranged and understood, but all that that means of the perfect Headship, sovereign Lordship, of Jesus Christ in all things, in every detail, is the first basic factor to spiritual fulness. In so far as He has His place in us and in our affairs, that will determine our measure of spiritual fulness, or the measure in which God is with us. The measure of God in fulness is the measure in which Christ is Lord. Of course, that is so familiar to you, that you wonder why there is so much emphasis, but there it is.
From ~ The Ordinances of Heaven by T. Austin-Sparks 1888~1971 (Date of Publication Unknown)