Albert Barnes Commentary Mark 1:25

"And Jesus rebuked him, saying, Hold thy peace, and come out of him." — Mark 1:25 (ASV)

And Jesus rebuked him. He chided him, or commanded him with a threat, to be still. This was not the man he rebuked, but the spirit, for he instantly commanded the same being to come out of the man.

In all this, Jesus did not once address the man. His conversation was with the evil spirit, proving conclusively that it was not a mere disease or derangement—for how could the Son of God converse with disease or delirium?—but that he conversed with a being who also conversed, reasoned, quibbled, felt, resisted, and knew him.

There are, therefore, evil spirits, and those spirits have taken possession of men.

Hold thy peace. Greek, Be muzzled. Restrain yourself. Cease from complaints, and come out of the man. This was a very striking proof of the power of Jesus, his ability by a word to silence an evil angel and, against his will, to compel him to leave a man whom he delighted to torment.