23 Just then a man with an unclean spirit was in their synagogue. He cried out, 24 “What do You have to do with us, Jesus—Nazarene? Have You come to destroy us? I know who You are—the Holy One of God!” 25 But Jesus rebuked him and said, “Be quiet, and come out of him!” 26 And the unclean spirit convulsed him, shouted with a loud voice, and came out of him.
Why wouldn’t Jesus allow the demon to say the truth about who He was?
What we first have to understand is even if a false teacher says or teaches one part of Scripture correctly and we accept it, we unknowingly will give him legitimacy as being a true Christian or even worse, God is using him. Those who witness us accept it will think that it is okay to believe some of their teachings as from the Holy Spirit, even though a false teacher does not have the Holy Spirit. Remember, false teachers are used by demons (1 Timothy 4:1-3) and their purpose is to teach the truth with small lies. Deception sounds like the truth and if we are not in the Word we won’t be able to see his true intentions behind his message. By accepting a teaching from someone who is false, you are putting yourself in danger and others to be deceived.
Never ever receive a doctrine, even if it sounds correct from a person that you know full well believes in unbiblical doctrines because it will always contain lies.
Let me illustrate it this way. When we go fishing, we must first deceive the fish with the bait. The bait is real but wrapped over a deadly hook. The fisherman allows the fish to nibble on the bait which is seemingly harmless until it tries to swallow all of it and in the process gets hooked.
That is how a false teacher directed by demons work. They will give you the truth as they hear it from true Christians because believe me, they didn’t get it from the Holy Spirit since they are devoid of Him. Once you have accepted some of their teachings, they will introduce their erroneous ones and it will be more palatable for you to receive it.
Now, we understand why Jesus didn’t accept the demon’s confession because the demon wasn’t really there to promote Jesus, just like a false teacher.
If Jesus would have allowed the demon to speak and proclaim who He was without the demon being rebuked by Him, it would have been easier for the evil spirit to deceive the crowd. Once the demon saw that they believed him, he would have introduced a false narrative of Jesus to deceive them all.
1 John 4:1
Dear friends, do not believe every spirit, but test the spirits to determine if they are from God, because many false prophets have gone out into the world.