26 Then they arrived at the country of the Gerasenes, which is opposite Galilee. 27 As he stepped out on land, a man of the city who had demons met him. For a long time he had worn no clothes, and he did not live in a house but in the tombs. 28 When he saw Jesus, he fell down before him and shouted at the top of his voice, "What have you to do with me, Jesus, Son of the Most High God? I beg you, do not torment me"- 29 for Jesus had commanded the unclean spirit to come out of the man. (For many times it had seized him; he was kept under guard and bound with chains and shackles, but he would break the bonds and be driven by the demon into the wilds.) 30 Jesus then asked him, "What is your name?" He said, "Legion"; for many demons had entered him. 31 They begged him not to order them to go back into the abyss.
Matthew Henry's Commentary on Luke 8:26-31
Commentary on Luke 8:22-40
(Read Luke 8:22-40)
Those that put to sea in a calm, even at Christ's word, must yet prepare for a storm, and for great peril in that storm. There is no relief for souls under a sense of guilt, and fear of wrath, but to go to Christ, and call him Master, and say, I am undone, if thou dost not help me. When our dangers are over, it becomes us to take to ourselves the shame of our own fears, and to give Christ the glory of our deliverance. We may learn much out of this history concerning the world of infernal, malignant spirits, which though not working now exactly in the same way as then, yet all must at all times carefully guard against. And these malignant spirits are very numerous. They have enmity to man and all his comforts. Those under Christ's government are sweetly led with the bands of love; those under the devil's government are furiously driven. Oh what a comfort it is to the believer, that all the powers of darkness are under the control of the Lord Jesus! It is a miracle of mercy, if those whom Satan possesses, are not brought to destruction and eternal ruin. Christ will not stay with those who slight him; perhaps he may no more return to them, while others are waiting for him, and glad to receive him.