The Spirit is compared to the wind, and, like the wind, He cannot be seen by our bodily eyes. But just as we know there is a wind by the effect it produces on waves, and trees, and smoke, so we may know the Spirit is in a man by the effects He produces in the man’s conduct. It is nonsense to suppose that we have the Spirit, if we do not also “walk in the Spirit.” (Gal. 5:25). We may depend on it as a positive certainty, that where there is no holy living, there is no Holy Ghost.