Aldous Huxley said this quote
“ Meanwhile, the self can stand in the way of the Not-Self, interfering with the free flow of spiritual grace, this maintaining the self in a state of blindness, and also with the flow of animal grace, which leads to the impairment of natural functions and, in the long run, of the slower processes called structure. For each individual human being, the main practical problems are these: How can I prevent my ego from eclipsing the inner light, synteresis, scintilla animae, and so perpetuating the state of unregenerate illusion and blindness? And these practical problems remain unchallenged, even if we abandon the notion of an entelechy or physiological intelligencer, of an atman or pneuma and think, instead, in terms [of] systems... ”