The long story of a person traveling and operating in many big worlds, encountering all kinds of people and things along the way, gave him a better understanding of his own hidden abilities, and at the same time gave him many ideas that he wanted to realize.
But this thought will also feed back into the world's various delusions about him...
P. S. It may be very old-school, because the author has delusions from childhood to adulthood, before or now.