Nick Mullen, who has a level of pathological self-loathing equal to Kanye's narcissism, has a really good analogy for the creative process. It's like looking at your dick, then taking a magnifying glass to it in order to get a better idea about it. After studying it for so long you forget you are using a magnifying glass. Then you show your dick to someone else and you say "Look how big my dick is!" and they are confused because all they see is how tiny your dick is.

The point is that famous artists are usually people who have convinced themselves, and everyone else around them, that their dick is enormous, regardless of it's actual size. People who, like 40k orcs, believe so strongly in their version of reality that they have kinda managed to manifest a part of it into the real world. Maybe there is a hint of the divine there, but, like the deities of old, it requires a sacrifice. Normally that sacrifice is of perspective, humility, or generally some level of sanity. And that is because it has to be, because the first person you have convince is yourself.