1 John 4:1-3

You to whom I give myself, many false prophets are now in the world, so do not believe every spirit. Examine the spirits to see whether they are from GOD. This is how you can recognize the SPIRIT of GOD: every spirit that says that JESUS is the CHRIST, and that he came to earth and became a human being, is from GOD. But every spirit that refuses to say that JESUS is the CHRIST, and that he came to earth and became a human being, is not from GOD. In fact, this is the spirit of the enemy of CHRIST, which you have heard is coming, and now is already in the world.