With Jesus pt4
The description emphasizes the destruction of his personality to the point of insanity by the demons and the ostracism and brutal treatment he had received from the people
The demons employed the name and a title of Jesus in a vain attempt to render him ineffective. Just as knowing the name of a demon was thought to assist in its exorcism (cf. v. 9), likewise using the name of the exorcist was thought to hinder him (cf. 1:24; 3:11). The title “Most High God” is sometimes used in the Old Testament by a Gentile to refer to the God of Israel, and that seems to be the case here. Inasmuch as adjuration formulas were usually used by the exorcist, the one here by the possessed person and/or his demon parodies an attempt to gain the upper hand.
Whether the word is a proper name as in the NIV, an arrogant boast, or an attempt to avoid giving the actual name is uncertain. No such proper name is elsewhere attested. No significance should be attached to the fluctuation between the singular and plural; sometimes the demons are looked upon as a whole and sometimes as individuals
The destruction of the pigs also had a definite purpose, to dramatically symbolize the ability of Jesus to destroy the demonic in human beings. To say the least, the restoration of the demoniac and the destruction of the demons were more important than the pigs
No doubt Mark’s description of the man in v. 15 pictures conversion. The man’s composure doubtless made a more positive impression on Jesus’ disciples than on the local residents. Because of their superstition they were terrified by anyone who had such enormous power, and they begged Jesus to go away. Ironically they feared Jesus more than they did the demoniac and cared more for their pigs than for a fellow human being. As important as miracles are in Mark’s account, he obviously did not use them to “prove” who Jesus was or to compel faith
Mark probably saw in the man the first missionary to the Gentiles and a preview of the Gentile mission that flourished during the quarter century before the writing of his Gospel.