Fred Coplestone defined religious experience as; something which “cannot be explained adequately and without residue… simply subjectively.” By this, he meant that an experience could be classified as religious if you are unable to explain it entirely in psychological terms without anything being left over.
For most Christians, these experiences give them evidence for a theistic God, although in the bible, it says that God will reward people who are believers but who haven’t actually witnessed a miracle more as they didn’t need evidence to believe. Some Christians may not believe in some religious experiences for example, stigmata as they may believe that it is unnecessary, and that it doesn’t prove anything about god, but to be Christian, it is important to believe in the resurrection story so they would have to believe that God could perform miracles.
Christians who have had religious experiences are often very certain that God caused it, but others would argue that as he is eternal; therefore outside time and outside space how could he, as if he experiences all plains of time at once, then how would he know what we are experiencing at a particular time, and if he was outside space, then he can’t have any matter, so how would he get into our world. But Christians would argue that he is god, so he can do anything in the universe, which he made.
Other Christians would argue that God gives them messages through their sub-conscious as a source of communication when they try to work out what the most moral thing in the situation would be. But it could be argued that people don’t always know what the right thing to do is, or they don’t do it, and why doesn’t God stop them doing things which are wrong. Some Christians would say that it is the ultimate price which we pay for freewill.
Arguably, Christians may wish there to be more to the world to make it fair, where the good are rewarded and the evil; punished. But the universe may not be fair at all. But, these experiences often make a big difference in people’s lives, so maybe as it does this it has to be God. But God may not cause these experiences: they may be purely natural. Thomas Hobbes said that when someone says that God has spoken to him in a dream, this “is no more than to say he dreamed that God spake to him” (Leviathan, pt. III ch.32).
But does it matter what the cause was, as the effect would be the same?