Their delight in evil is what has this blinding effect. It surrounds them like a fog over a swamp, absorbing and suffocating rays of light. This is the nature of hellish delight. It radiates from hell and flows into every human being, but only into the soles of our feet, our back, and the back of our head. If we receive that inflow with our forehead and our chest, however, we are slaves to hell, because the human cerebrum serves the understanding and its wisdom, whereas the cerebellum serves the will and its love. This is why we have two brains. The only thing that can amend, reform, and turn around hellish delight of the kind just mentioned is a rationality and morality that is spiritual.
Allow me to briefly describe people whose rationality and morality are merely earthly. Such people are truly sense-oriented. If they continue in this direction, they become bodily or carnal. The description that follows will be presented as a list of points in outline form.
“Sensory” is a term for the lowest level of life within the human mind; it clings, and is closely joined, to the five senses of the human body.
“Sense-oriented people” are people who judge everything on the basis of their physical senses—people who will not believe anything unless they can see it with their eyes and touch it with their hands. What they can see and touch they call “something.” Everything else they reject.
from Regeneration, Pages 44