The false prophet has no call from God, therefore his prophesy can have no efficacy. What is prophesy without inspiration? What can it possibly achieve? The false prophet goes through the motions of being s prophet but he lacks the one thing that makes prophecy special: the Lord speaking through him.
But something like this is true of the minister who is preaching a message not derived from Scripture. He claims to be a minister of God, but his doctrine originates in the traditions of men. God has not sent him. His doctrine is derived from the ideas of men, and there is no power in it. How can any go when they are not sent? The difference between being sent and presumptuously sending oneself is vast. ‘But if they had stood in my counsel, and had caused my people to hear my words, then they should have turned them from their evil way, and from the evil of their doings.’ Did they want real instrumentality? They have forfeited it. It is the Holy Spirit who blesses, and he will only bless his own word and that which is consistent with his word. No wonder the Spirit says that there will arise those ‘having a form of godliness, but denying the power thereof.’ They are aware that what they teach is no more than human ideas, and so they assume all religion is powerless.