Quoting Brain:

What's obvious is that highly complex designs in our PHYSICAL world must have been created by intelligence, in fact, by a REALLY BIG POWERFUL INTELLIGENCE. An Intelligence outside the PHYSICAL universe since intelligence is not going to happen by chance in our PHYSICAL universe (even if presentism was true, and it's not). That Intelligence comes from outside the PHYSICAL universe. What are things like over there? In the SPIRITUAL world. Well, we don't have much to go on since we've had no chance to investigate it. It looks like intelligence can self-organize over there. Or it is just natural for intelligence to exist over there. God says He has no beginning and has no ending. He just IS. I am going to guess that the same thing extends to human souls. Human souls, like God, just exist with no beginning and no ending, although clearly human souls are not as big and knowledgeable and powerful as God. I tend to think that it would be impossible for God to not exist. The logician Kurt Gödel produced a proof (that not everyone accepts) that if God could possibly exist, He must exist. The only way God could not exist is if it was impossible for Him to exist.

So, to make it short, just because intelligence can't happen by chance in the physical world, it doesn't mean that intelligence can't exist in the spiritual world. It's not fair for Brain to reach that conclusion.