Look into Augusto Perez from The Appearance Ministries. He is originally from Cuba.
There is such a thing as having a real encounter with God. It's not just words, or a belief system. Also, Pastor El Masih from Cry of the Persecuted Church. God plucked him out of a no where life from Pakistan. He had an encounter with God too - it wasn't just words or belief that got him either.
Henry Gruver only ministers as directed by God. When he does things on his own, he could easily meet death. This is why he has to go with God.
God can and does prove Himself real. There's nothing to deny, though you can still turn away.