6 Bible Verses about Testing Spirits

Beloved, do not believe every spirit [speaking through a self-proclaimed prophet]; instead test the spirits to see whether they are from God, because many false prophets and teachers have gone out into the world.

and to another the working of miracles, and to another prophecy [foretelling the future, speaking a new message from God to the people], and to another discernment of spirits [the ability to distinguish sound, godly doctrine from the deceptive doctrine of man-made religions and cults], to another various kinds of [unknown] tongues, and to another interpretation of tongues.

By this you know and recognize the Spirit of God: every spirit that acknowledges and confesses [the fact] that Jesus Christ has [actually] come in the flesh [as a man] is from God [God is its source]; and every spirit that does not confess Jesus [acknowledging that He has come in the flesh, but would deny any of the Son’s true nature] is not of God; this is the spirit of the antichrist, which you have heard is coming, and is now already in the world. Little children (believers, dear ones), you are of God and you belong to Him and have [already] overcome them [the agents of the antichrist]; because He who is in you is greater than he (Satan) who is in the world [of sinful mankind]. read more.
They [who teach twisted doctrine] are of the world and belong to it; therefore they speak from the [viewpoint of the] world [with its immoral freedom and baseless theories—demanding compliance with their opinions and ridiculing the values of the upright], and the [gullible one of the] world listens closely and pays attention to them. We [who teach God’s word] are from God [energized by the Holy Spirit], and whoever knows God [through personal experience] listens to us [and has a deeper understanding of Him]. Whoever is not of God does not listen to us. By this we know [without any doubt] the spirit of truth [motivated by God] and the spirit of error [motivated by Satan].

Now these people were more noble and open-minded than those in Thessalonica, so they received the message [of salvation through faith in the Christ] with great eagerness, examining the Scriptures daily to see if these things were so.

But test all things carefully [so you can recognize what is good]. Hold firmly to that which is good.

and how from childhood you have known the sacred writings (Hebrew Scriptures) which are able to give you the wisdom that leads to salvation through faith which is in Christ Jesus [surrendering your entire self to Him and having absolute confidence in His wisdom, power and goodness]. All Scripture is God-breathed [given by divine inspiration] and is profitable for instruction, for conviction [of sin], for correction [of error and restoration to obedience], for training in righteousness [learning to live in conformity to God’s will, both publicly and privately—behaving honorably with personal integrity and moral courage]; so that the man of God may be complete and proficient, outfitted and thoroughly equipped for every good work.