I think he doesn't lie, he just has a severely warped view of reality, and an incredibly inflated sense of his own capabilities. He won a lottery and thinks it was intentional.

His public blabber on ai and automation are a great peek inside his mind.

The mindset is "That problem isn't solved because I haven't worked on it yet." There's no self awareness or humility involved, and he can afford the apparatus to maintain that for the rest of his life.