“They were all amazed.

They said to one another.

‘What kind of utterance

Is this?

With authority

And power

He commands

The unclean spirits.

Then out they come.’”

καὶ ἐγένετο θάμβος ἐπὶ πάντας, καὶ συνελάλουν πρὸς ἀλλήλους λέγοντες Τίς ὁ λόγος οὗτος, ὅτι ἐν ἐξουσίᾳ καὶ δυνάμει ἐπιτάσσει τοῖς ἀκαθάρτοις πνεύμασιν καὶ ἐξέρχονται;

This is very similar, almost word for word, to Mark, chapter 1:27.  Luke said, that amazement or astonishment came over all of them (καὶ ἐγένετο θάμβος ἐπὶ πάντας).  This was a common reaction that people had to the activities of Jesus.  The people were saying or speaking to one another (καὶ συνελάλουν πρὸς ἀλλήλους λέγοντες).  What is this new teaching with authority (Τίς ὁ λόγος οὗτος, ὅτι ἐν ἐξουσίᾳ)?  Thus, he commands with power even the unclean spirits (καὶ δυνάμει ἐπιτάσσει τοῖς ἀκαθάρτοις πνεύμασιν), so that they come out of that person (καὶ ἐξέρχονται).  Jesus seemed to have some special spiritual powers that no one else had ever seen.