The supersensible nature of the heart is the penultimate expression of the human soul and spirit. From ancient teachings to modern research, there is no greater sense organ that exists beyond the human heart. The modern view that the brain is the seat of the mind and consciousness is simply partial truth. Without the heart being in coherence with the brain, the brain is only a mirror of the five senses that is lacking wisdom without the participation of the heart. Brain-bound thinking leads to cold, dead, materialistic shadow-thinking that will not get beyond superficial knowledge.
But heart-thinking, the source of wisdom extracted from experience, is the key to understanding the meaning of life and the reality of life after death.