It is interesting that cancer of the heart is a rare occurrence. Can we find the answer in religion? In the Heaven’s Truth Religion (Tenrikyo), God tells us that mankind was created from Heaven and earth. God used the instruments or creatures of the sea and the pure heart of God in creating mankind. We all have the pure heart of God in each of us. But whether God is actually talking about the physical fist size organ as the heart, or an abstract nonphysical entity, often describes as the soul, is unknown.
But ever since the first sin, our pure hearts (souls) have become surrounded by our evil thoughts of greed, arrogance, and self-love. God tells us in our religion, these dusts are what prevent our pure hearts from bringing upon joy. These dusts surrounding our hearts also bring upon disease like cancer, which can spread to all parts of our bodies. These dusts also develop into sufferings and misfortunes upon oneself. Again one must wonder why the heart is not prone to the malignant cells that ravage many of our organs. Could it be because the heart or soul is from God? If this is so, is the following verse from the Ofudesaki (Tip of the Writing Brush) relevant?
Among all mankind, there is no one who is evil.
It is only a bit of dust stuck on. 1-53
If this is true, the evils that we must destroy are the thoughts of greed, arrogance, and self love. We must eliminate these thoughts from our minds, and from the minds of the people we think to be evil.