To imagine yourself an octopus, you must perhaps divide your very consciousness into at least seven parts, six arms or more and a head. To imagine this, you might think of seven friends or brothers, so close that they seem to be "inseparable."
It's difficult to assert, as Harris does, that if people just think about it enough, they will come to understand that their most basic sense of consciousness is not really there. The advantage of such an approach is that it conveniently elides the conclusions that many would be drawn to make.
Our belief in the value of human aspirations has been often challenged by voices claiming that all these valued aspects of our humanity must be illusions. Can on construct a scientific conception of the world that permits a hopeful view of the human future?
The interesting thing about these ideas -- the things we most desperately want out of life -- is that they are all functions of mind, and it's clear that the human species can eat, live and reproduce just fine in the complete absence of them.