This made me realize that eyes are the only sense which is not associated with any emotion. Eyes only process information that it sees, then our mind build thoughts around it with certain emotion attached to it. It shows you things the way they are. So seeing things with your naked eyes is the best way to validate the existence of anything physical. I have heard one of my religious friend saying that "There is another creation beyond this universe called Spiritual Sky where God himself resides with full of all opulence and this Universe is almost insignificant in front of that Spiritual sky. But I won't believe it until I experience it or see it through my eyes.