This is a beautiful and classic example of exteriorisation. It's a pitty however that definitions like brain, mind and spirit are all mixed up. The talk also gives the idea that it has all to do with the brain, which is wrong. The knowledge however is there. I suggest to read Dianetics for understanding of how the mental works, and Sientolgy basic studies for an understanding of the spirit, as these works are the scientific explenation of what you hear in this talk.