6 Bible Verses about Testing Spirits

Loved ones, do not believe [the message of] every spirit [i.e., every person claiming to be a teacher], but test the spirits [i.e., require proof that they and their message are genuine] to see whether they represent God [or not], because many false prophets have begun circulating throughout the world.

Another [is given] the ability to perform miracles; and another [is given] the ability to prophesy [supernaturally]; and another [is given] the ability to speak in different languages [supernaturally]; and still another [is given] the ability to interpret those languages [supernaturally].

Here is how to know [who is speaking from] the Holy Spirit of God: Every spirit [i.e., person] who proclaims that Jesus Christ has come [to earth] in a physical body is [speaking] from God. [See I Cor. 12:3]. But every spirit who does not proclaim [this truth about] Jesus is not [speaking] from God. And this [person] represents the spirit of the antichrist [See 2:18-22; II John 7], whom you have heard would come. Well, now he is already here! [But], you people are [followers] of God, little children [i.e., dear ones], and you have overcome them [i.e., these false teachers] because He who is in your lives [i.e., the Holy Spirit, See 3:24] is greater [i.e., more powerful] than he who is in [i.e., dominates] the world [i.e., Satan. See II Cor. 4:4].read more.
These [false teachers] are part of the world, so [naturally] they speak [a message endorsed] by the world and the world listens to them. We [who preach the true Gospel] represent God; the person who knows God listens to our message; the one who does not belong to God does not listen to us. This is how we can know [the difference between those speaking by] the Holy Spirit of truth and [those speaking by] the spirit of [Satan's] error.

Now these people [in Berea] had more character than those in Thessalonica because they [not only] received the message with an open mind but [also] examined the [Old Testament] Scriptures every day to see if what they had heard was really true.

Put everything [i.e., speakers and their messages] to the test, [then] hold onto what is good.

And [remember] that, from childhood, you have known the sacred Scriptures which are able to make you wise [enough] to be saved through faith in Christ Jesus. All Scripture is inspired by God [Note: Literally, this word means "breathed out by God"] and is useful for teaching [truth], rebuking [wrongdoing], correcting [error] and for providing instruction [i.e., training] on how to live right, so that the man of God will be thoroughly equipped for [doing] every good deed.