A person has ten fingers and one heart.
Hands can be hurt, and so can the heart.
A person with an injured hand has difficulty moving, and a person with an injured heart is a walking corpse.
The heart cannot be illuminated by the sun, but it can be warm; it cannot feel the winter, but it is like falling into an ice cellar.
People who have lost their hands can live; people who have lost their hearts can also live.
If the stone is soft, maybe what I said back then can be repeated.