There will be many false spirits to get you to follow them.

Try the spirit to know the true Spirit.

If the spirit confess that Jesus Christ came in the flesh it is of God.

I John 4:1-2 (KJV) – beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world. Hereby know ye the Spirit of God: Every spirit that confesseth that Jesus Christ is come in the flesh is of God.