Can We Train Our Brains to Experience God?
Jack Preston King

Empirical science can never adequately “track or scan” God because He is beyond those finite measures and standards. Speaking in tongues is a form of communication with God and He with the person who speaks in tongues. The existence of God and relationship with Him can’t be scanned or examined anymore than all that goes on with any of our human personal relationships.

But I’m glad you’re seeking and considering all of this.