The Tower in Eisenberg

I have been a little confused over the significance and importance of the tower in Eisenberg's writings. I understand it as a the metaphor for where we view life from, above everything else, from chapter 11. The mental home, as he calls it, is not really our home at all, but built by someone else. Does this mean that we are destined to live in this tower, and can't change our destiny, or is he stressing that we need to change our destiny from the tower, and look from the mountain?