1 Corinthians 12:3

This then is the first difference between a soothsayer and a prophet; but a second and a different one is that which he next states, saying, "Wherefore I give you to understand, that no man speaking in the Spirit of God calleth Jesus accursed:" and then another: "and that no man can say that Jesus is the Lord, but in the Holy Ghost." "When thou seest," saith he, "any one not uttering His name, or anathematizing Him, he is a soothsayer. Again, when thou seest another speaking all things with His Name, understand that he is spiritual." "What then," say you, "must we say concerning the Catechumens? For if, no man can say that Jesus is the Lord but by the Holy Ghost, what must we say of them who name indeed His Name, but are destitute of His Spirit? But his discourse at this time was not concerning these for there were not at that time Catechumens, but concerning believers and unbelievers. What then, doth no demon call upon God's Name? Did not the demoniacs say, "We know Thee who Thou art, the Holy One of God?" Did they not say to Paul, "these men are the servants of the Most High God?" They did, but upon scourging, upon compulsion; never of their own will and without being scourged. But here it is proper to enquire, both why the demon uttered these things and why Paul rebuked him. In imitation of his Teacher; for so Christ did also rebuke: since it was not his will to have testimony from them. And wherefore did the devil also practise this? Intending to confound the order of things, and to seize upon the dignity of the Apostles, and to persuade many to pay attention to them: which had it happened, they would easily have made themselves appear from hence worthy of credit, and have brought in their own designs. That these things then might not be, and the deceit might not have a beginning, he stops their mouths even when speaking the truth, so that in their falsehoods men should not at all give heed unto them, but stop their ears altogether against the things said by them.