I agree about the fruits. I think we can also test the spirits by whether or not what they say is consistent with the Bible. And I think spiritual discernment and our intellect can also be used.
Well said. I would only add that one should make God central to any such quest. .. and in so doing, be willing to accept his will as his spirit wispers to us. Trying to decipher truth without the Holy Ghost is problematic.
Neh. 9: 20 Thou gavest also thy good spirit to instruct them.
John 5: 32 (Acts 5: 32) there is another that beareth witness of me.
John 15: 26 when the Comforter is come . . . he shall testify of me.
Acts 2: 37 (Acts 2: 41) they were pricked in their heart.
1 Cor. 2: 11 things of God knoweth no man, but the Spirit of God.
1 Cor. 12: 3 no man can say that Jesus is the Lord, but by the Holy Ghost.