6 Bible Verses about Testing Spirits

Beloved, believe not every spirit, but try the spirits, whether they are of God, because many false prophets are gone out into the world.

to another the gift of healing by the same Spirit; To another the working of miracles; to another prophecy; to another the discerning of spirits; to another divers kinds of tongues; to another the interpretation of tongues.

Hereby ye know the spirit of God: every spirit which confesseth Jesus Christ come in the flesh, is of God. And every spirit which confesseth not Jesus Christ come in the flesh, is not of God: and this is that spirit of Antichrist, whereof ye have heard that it should come; and now already it is in the world. Ye are of God, beloved children, and have overcome them; because greater is he that is in you, than he that is in the world.read more.
They are of the world; therefore speak they of the world, and the world heareth them. We are of God; he that knoweth God, heareth us: he that is not of God, heareth not us: hereby know we the Spirit of truth and the spirit of error.

These were more ingenuous than those of Thessalonica, receiving the word with all readiness of mind, and daily searching the scriptures, whether those things were so?

Prove all things; hold fast that which is good.

And that from an infant thou hast known the holy scriptures, which are able to make thee wise unto salvation, thro' faith which is in Christ Jesus. All scripture is inspired of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness; That the man of God may be perfect, throughly furnished unto all good works.