1 John 4:2

This is how you can recognize the Spirit of God: Every spirit that acknowledges that Jesus Christ has come in the flesh is from God,

(v2, NIV)

There is a need to test the spirits. We must not be easily caught into the wind of false doctrine. Instead, we must be firmly grounded and test the spirits. So, how do we test the spirits? The test is this: spirits that acknowledge that Jesus Christ has come in the flesh are from God. This is an agreement and abiding in the teaching of Jesus Christ. Some may speak otherwise, but do not listen to them. These speak from a different spirit. The spirit in them is not from God. These people do not hold fast to the teaching of Jesus Christ. Jesus Christ came down in the flesh. For Jesus to have come down in the flesh means that he came down from somewhere. Jesus Christ came down from heaven, and took the form of a man. Jesus Christ, God's son, came down from heaven to earth and took on flesh. That isn't all there is to it, but it is part of it. Test the spirits and ensure they agree with the teaching of Jesus Christ.