
In Happiness she highlights an important point: Our brains have allowed us to survive and prosper on this planet, but not by all-encompassing vision. Rather, it is limited vision that focuses us on a few things while we ignore things that do not aid survival. We survive attacks by beasts and by each other, and threatening weather and climate. Quoting William James from Varieties of Religious Experience:
…our normal waking consciousness, rational consciousness we call it, is but one special type of consciousness, whilst all about it, parted from it by the flimsiest of screens, there lie potential forms of consciousness entirely different. We may go though life without suspecting their existence; but apply the requisite stimulus , and at a touch they are there in all their completeness….No account of the universe in its totality can be final which leaves these other forms of consciousness quite disregarded.
From Aldous Huxley’s Doors of Perception:
The function of the brain and nervous system is to protect us from being overwhelmed and confused by this mass of largely useless and irrelevant knowledge, but shutting out most of what we should otherwise perceive or remember at any moment, and leaving only that very small and special selection which is likely to be practically useful.





