The heart of the matter is whether we believe or disbelieve in the existence of a spiritual realm. All people are divided into two groups, those who are alive and those who are dead; in other words, those who believe and those who don’t. An unbeliever says: “What is spirit! ... What I ate and what I enjoyed, this is what I possess, this is material and real!” And such a person, without thinking much, takes care only of the outer things, arranging in order only his own mean, dirty affairs; he becomes a liar, a snob, a slave, and does not feel any higher needs: freedom, truth, and love. Such a person keeps away from the light of the intellect, because in fact he is dead, and this light gives life only to living things, and hardens and rots the dead things.