6 Bible Verses about Testing Spirits

Do not believe every spirit, beloved, but test the spirits to see if they come from God; for many false prophets have emerged in the world.

one has prophecy, another the gift of distinguishing spirits, another the gift of 'tongues' in their variety, another the gift of interpreting 'tongues.'

You can recognize the Spirit of God by this: every spirit which confesses Jesus as the Christ incarnate comes from God, and every spirit which does not confess Jesus [incarnate] does not come from God. This latter is the spirit of antichrist; you were told it was coming, and here it is already in the world. My dear children, you belong to God, and you have conquered all such, for He who is within you is greater than he who is in the world.read more.
They belong to the world, therefore they speak as inspired by the world, and the world listens to them: we belong to God ??he who knows God listens to us, he who does not belong to God does not listen to us. This is how we recognize the spirit of truth and the spirit of error.

where the people were more amenable than at Thessalonica; they were perfectly ready to receive the Word and made a daily study of the scriptures to see if it was really as Paul said.

but test them all, retaining what is good

remember you have known from childhood the sacred writings that can impart saving wisdom by faith in Christ Jesus. All scripture is inspired by God and profitable for teaching, for reproof, for amendment, and for moral discipline, to make the man of God proficient and equip him for good work of every kind.