In Carlos C.'s journeys he is eventually brought to meet an individual know as the "Tenant". The Tenant is supposedly thousands of years old and is one of very few individuals that have found a way to be nearly immortal. I remember in the reading that he mentions to Carlos that he spends almost no time in the physical world. To Mr. Bruce's statement above, the Tenant has also transformed himself into a woman even though he was born a man. Another key to his survival is a kind of give and take relationship with those that are brought to see him. He teaches the mystic a special power of their desire i.e. how to turn into an animal or fly. In return the Tenant takes a specific type of energy from you. This must be agreed upon by the receiver of the wisdom, but at the same time if you are brought to him, it doesn't seem like you have an option.

Interesting stuff!