=15.= A forceful illustration of the futility of false ceremonies, or of the mere form of sacred ordinances when the authority is absent, is shown in the New Testament record of the seven sons of Sceva. These in common with others had seen, and had marveled at, the miraculous power exhibited by Paul, whom the Lord so blessed in his apostleship that through contact with handkerchiefs or aprons sent by him the sick were healed, and their evil spirits were cast out. Sceva's sons, who are counted by the sacred chronicler among the exorcists and the vagabond Jews, sought also to expel an evil spirit: "We adjure you by Jesus whom Paul preacheth," said they; but the evil spirit derided them for their lack of authority, exclaiming: "Jesus I know, and Paul I know, but who are ye?" Then the afflicted person, in whom the evil spirit dwelt, leaped upon them and overcame them, so that when they escaped from the house they were naked and wounded.[576] [576] Acts xix, 13-17. =16. Teachers True and False.=--None but those who are duly authorized to teach can be regarded as true expounders of the word. The remarks of Paul concerning the high priests are alike applicable to every office of the priesthood: "No man taketh this honor to himself, but he that is called of God, as was Aaron."[577] And Aaron, as we have already seen, was called through Moses unto whom the Lord revealed His will in the matter. This authority to act in the name of the Lord is given to those only who are chosen of God; it is not to be had for the mere asking; it is not to be bought with gold. We read of Simon, the sorcerer, who coveted the power possessed by the apostles; he offered these ministers of Christ money, saying, "Give me also this power that on whomsoever I lay my hands he may receive the Holy Ghost." But Peter answered him with righteous indignation, "Thy money perish with thee, because thou hast thought that the gift of God may be purchased with money; thou hast neither part nor lot in this matter, for thy heart is not right in the sight of God."[578] [577] Heb. v, 4. [578] Acts viii, 18-24.