“The existence of spiritual life in any one believer disproves your point.”
What about spiritual Mormons? Buddists? Muslims? Acting spiritually, while better than not, obviously, is no indicator of truth.
They are living a soulish life, attempting to counterfeit the spiritual life. The closest they come is by encountering spirits by witchcraft and demonic influence, but not through faith in what God provides.
The Christian life is not merely some comparative religious construct. It is a very real life discernible from physical and soulish living. It doesn’t come by anybody changing their mind or perspective, but only comes from the creation of the human spirit in the believer by only God Himself.