People with cerrtain types of mental illmess cannot distinguish between reality and delusion. They believe that what they perceive is real. Such people claim that they hear voices and see things, but what such persons experience no matter how real it seems to them is only mental ilness. People that use certain drugs too halucinate and too what they experience seem very real. THen there are the religious nuts and also the liars Does this mean that one has to be crazy or on drugs to communicate with God? Jws allege that they have "a relationship with God". I think that a relationship invloves communion between parties. A person can talk or pray to a walll but he cannot have a relationship with it. Only if God responds or communicates in some unmistkable remarkable way with a person can that person really have such a relationship. I do not believe that the substance of the Bible or religious affiliation is sufficient to convince an intelligent and rational person without a doubt in the existence of God.
In other terms, I am convinced that God answers prayer. When a person talks to God it is called prayer. When God communicates in some way, it is called an answered prayer. There are many coincidences that happen but if lightning strikes in the exact same place multiple times that is no coincidence. I believe that God will unmistaikingly convince the individual in a very special and personal way.
That is what I think, but then again what do I know?