Delusions make the human mind that more amazing

[Mozart Link]

Some cases there are negative consequences, but in some cases beliefs do exist in a vacuum. For example, I am someone who likes to play videogames and if I had the delusional belief that, when I see the fantasy world on my t.v. screen from playing a videogame and conclude that this must be some other dimension and this is something that just brings me personal pleasure, how would that cause negative consequences?

You don't get to say 'beliefs do exist in a vacuum' and then give an example of one specific belief at one specific time. You're creating the vacuum in your example, without considering how that delusion might affect your other beliefs or your actions. I don't know what's got you into this 'just let me have my fantasy' state of mind, but jesus, wake up to the real world man.

That mindset is very important to me because I use that in composing music that has beautiful fantasy-like emotion to it and such and I do not want anything in reality to interfere with it. Although there are people who do use inspiration from reality and use that to compose music, I am not this type of person at all. I can use my inspiration from fantasy to achieve greatness and success in life just as good (if not better) than those people who do with inspiration from reality. Therefore, this right here says that my personal delusional fantasies will not have negative consequences for me. Instead, it is the exact opposite and I will be a successful composer in life because of it.