I will only touch this what I know. When I get delusional. I believe things that are not real. Such as once I believed I could read the way people were feeling inside. I believed God gave me a special ability to be able to sense this in people and that I could manipulate their feelings. Another example. I got a promotion at work and I believed without any experience in this field whatsoever that I would be without one single doubt in my mind the best the company had ever had. I was planning on all this money because i knew i would surpass my quota was about to go out and buy a new car and la-ti-da. No one could have told me any different because I knew what I was going to do and that I was already the best. Its like unreal things get into your mind only there is nothing in your mind that tells you that they are unreal everything seems completely real and legit and normal to you.