Gospel of Mark Chapter 1 Vs. 27

 Jesus Heals a Man with an Unclean Spirit

Mark 1:27 “And they were all amazed, insomuch that they questioned among themselves, saying, What thing is this? what new doctrine [is] this? for with authority commandeth he even the unclean spirits, and they do obey him.”

They questioned among themselves (συνζητεῖν πρὸς ἑαυτοὺς)

Stronger than Luke, who has they spake together. Tynd., They demanded one of another among themselves.

What thing is... Questions 3-4. Next, Mark 2:7.

for with authority... (see verse 22). Jesus had absolute authority in His actions as well as His words (Mat. 28:18).

You must remember that in the synagogue there was much formality and tradition. Really these scribes had been trained to go through a certain ritual, and they knew technically what was required of them; but they had no power within themselves.

You might say that I am being judgmental, but we have just seen that these evil spirits had no fear of the scribes. They just came right into the synagogue with the man. The amazing thing to them was the power and authority of Jesus’ message.

they do obey... They always obey those that have power over them. When men claim this power and it does not work it is proof that they do not have power (Acts 19:13-18). This case is also proof that it is not necessary for unbelievers to be absent in order for God’s power to work. When men claim that opposition present hinders God’s power it is an excuse for their powerlessness.

Was it not a mournful association of ideas which then led Jesus to reply, Have I not chosen you the Twelve, and one of you is a devil?* (*The connection would be almost certain if the word devil were alike in both. But in all these narratives it is demon, there being in Scripture but one devil.)

But although the phrase is beautiful, and possibly wild with all regret, there is no relenting, no better desire than to be let alone. And so Jesus, so gentle with sinful men, yet sometime to be their judge also, is stern and cold. Hold thy peace -- be muzzled, He answers, as to a wild beast, and come out of him. Whereupon the evil spirit exhibits at once his ferocity and his defeat. Tearing and screaming, he came out, but we read in St. Luke that he did the man no harm.

All the people were greatly amazed ethambēthēsan, surprised, astonished; cf. Mark 10:24, 10:32). Their question, What is this? referred both to the nature of Jesus’ teaching and His expulsion of a demon with only a word of command. His teaching was qualitatively new kainē and came with authority (cf. Mark 1:22) that extended even to demonic forces who were forced to obey submit to Him (cf. Mark 4:41).