Mark 1:23 Meaning

21And they went into Capernaum; and straightway on the sabbath day he entered into the synagogue, and taught.

22And they were astonished at his doctrine: for he taught them as one that had authority, and not as the scribes.

23And there was in their synagogue a man with an unclean spirit; and he cried out,

24Saying, Let us alone; what have we to do with thee, thou Jesus of Nazareth? art thou come to destroy us? I know thee who thou art, the Holy One of God.

25And Jesus rebuked him, saying, Hold thy peace, and come out of him.