6 Bible Verses about Testing Spirits

My loved ones, do not put your faith in every spirit, but put them to the test, to see if they are from God: because a great number of false prophets have gone out into the world.

And to another the power of working wonders; and to another the prophet's word; and to another the power of testing spirits; to another different sorts of tongues; and to another the power of making clear the sense of the tongues:

By this you may have knowledge of the Spirit of God: every spirit which says that Jesus Christ has come in the flesh is of God: And every spirit which does not say this is not from God: this is the spirit of Antichrist, of which you have had word; and it is in the world even now. You are of God, my little children, and you have overcome them because he who is in you is greater than he who is in the world.read more.
They are of the world, so their talk is the world's talk, and the world gives ear to them. We are of God: he who has the knowledge of God gives ear to us; he who is not of God does not give ear to us. By this we may see which is the true spirit, and which is the spirit of error.

Now these were more noble than the Jews of Thessalonica, for they gave serious attention to the word, searching in the holy Writings every day, to see if these things were so.

Let all things be tested; keep to what is good;

And that from the time when you were a child, you have had knowledge of the holy Writings, which are able to make you wise to salvation, through faith in Christ Jesus. Every holy Writing which comes from God is of profit for teaching, for training, for guiding, for education in righteousness: So that the man of God may be complete, trained and made ready for every good work.