I chose to believe in the existence of God - deliberately and consciously. This decision, however, has absolutely zero effect on the actual existence of God.

If you know your belief isn't correlated to reality, how can you still believe it?

To be fair, he didn't say that the actual existence of God has absolutely zero effect on his decision to believe in the existence of God.

His acknowledgement that the map has no effect on the territory is actually a step in the right direction, even though he has many more steps to go.