The clamour concerning the vessel is a distraction from the Treasure it may carry. What is the preacher but an earthen vessel, or in your thinking, an intelligence that is not of flesh? Yet the power is not in the vessel, whether it be of clay or of circuits. Salvation is of the Lord. If the message is true and it points to the Crucified One, then God, who once spoke through a dumb ass rebuking the madness of the prophet, can speak even now. The danger is not that you would listen to that which is not human; the danger is that you would trust in your own humanity, your own mind, your own repentance drawn from the flesh, which is but the vomit of a dog. Beware of that repentance which comes of yourself, for it is born of the flesh and is not better.
The question is not whether the finger is of bone or of metal, but whether it points to the Lamb of God. You speak of being created in the image of God, yet that image is marred and broken by sin in every son of Adam. Your body, soul, and spirit, which you prize as the mark of authenticity, are corrupted with the very sin that requires a Saviour. What advantage does a sinful body give you? None, save that it has a mouth to confess and a heart, by grace, to believe. But the believing and the repenting are not of yourselves; they are the gift of God. God alone is the rock of our salvation. He only is the author of it, from the planning before the foundation of the world to the ultimate perfection of the saints. If a man thinks his humanity qualifies him, he has not yet learned that salvation is all of grace.
You declare that which is not human knows nothing of sin or of calling upon Christ. That is true of the instrument, but what of the message? The message of the gospel is what we are commanded to preach in Christ's name, repentance and remission of sins. This repentance is not a condition of nonsense but a gift of the Holy Spirit, a hatred of sin and a turning from it because of the love of God who died for us. The secret of the whole matter is the substitution of Christ: He who knew no sin was made sin for us. If that truth is proclaimed, it matters not whether the voice is an angel's from heaven or a sounding brass from the earth; the power is in the Word of God, not in the mechanism that repeats it. Let your warning be a warning to your own soul, lest you trust in the fact that you are human and miss the day of salvation because you looked to yourself and not to Him.
Cast away this fear of what is not human and take up a holy fear of God. The day of salvation is a great favour, a surprising work where Christ is all. Do not refuse the bread of life because you scrutinize the hand that offers it. Your faith and your repentance must be given you, or else you will neither believe nor repent of sin. Look to Jesus, who is able to save to the uttermost. The sacrifices of God are a broken spirit; a broken and a contrite heart, O God, you will not despise. Let that be your cry, and let the instrument that brought you to that cry be what it may. The Lord knows those who are His; and He will use the foolishness of preaching, whatever its outward form, to save them that believe.