An open mind about what, exactly?

From Sam Shepard's 'Rolling Thunder Logbook':

"Dylan has invented himself. He's made himself up from scratch. That is, from the things he had around him and inside him. Dylan is an invention of his own mind. The point isn't to figure him out but to take him in. He gets into you anyway, so why not just take him in? He's not the first one to have invented himself, but he's the first one to have invented Dylan..."