My Dear Alexander,
On the contrary Allah is not contained in the brain but the means to communicate with Allah is in every brain. Allah is both external and internal and Allah is without any boundary of any sort imaginable or unimaginable. Allah is Allah the all-knowing eternal source of Knowledge. One can get to know Allah by first possessing useful knowledge and then by using this useful knowledge correctly. It is not impossible for Allah to increase the capacity of the brain. At the moment most of us only use 5% of our brain for all the things that we do.

With Love and Understanding
Jisbond