Luke 8:27

And when he was come forth upon the land, there met him a certain man out of the city, who had demons; and for a long time he had worn no clothes, and abode not in any house, but in tombs.

Reference is made to the parallel accounts of this wonder in both Matthew and Mark and to the comments concerning it in my Commentary on Matthew and my Commentary on Mark. Luke added the detail of the man's wearing no clothes.

In this series, several dissertations on demon possession have already been written, supporting the conclusion that: (1) demon possession was certainly a fact in those times; (2) it could be a fact today; (3) if it is not a fact today, it is due to the success of Jesus in destroying the works of Satan; and (4) there are too many unknowns regarding human behavior today to allow any dogmatic conclusion to the effect that such a phenomenon has perished from the earth. Again from Geldenhuys:

With the incarnation of the Word, the Son of God, the forces of the devil also, in order to oppose him as Man and in his work of redemption, endeavored to incarnate themselves in human beings. The Evil One, as it were, wanted to become a man. It is for this reason that demon-possession was such a characteristic phenomenon of the time when Jesus was upon the earth.[13]

That such was indeed Satan's purpose would appear as a natural deduction from Satan's behavior as revealed in the Old Testament. When Aaron cast his rod upon the ground and it became a serpent, Satan's representatives at once imitated and reproduced, apparently, the same miracle, with this difference, that Aaron's rod-serpent swallowed all of theirs! (Exodus 7:12).

There were actually two of these demoniacs, as related in Matthew; but as Boles expressed it, "He who tells of the two includes the one, and he who tells of the one does not deny the two."[14]

[13] Ibid., p. 256.

[14] H. Lee Boles, Commentary on Luke (Nashville: Gospel Advocate Company, 1940), p. 175.