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, and every spirit that does not acknowledge Jesus is not from God. This is the spirit of the Antichrist, about whose coming you have been told, and that it is already in the world.
See what love the Father has bestowed on us, enabling us to be called the children of God, and that is what we are. If the world does not recognize us, that is because it did not know him.