The human heart: the four-chambered pump that quickly sends warm, oxygen-rich blood through the vessels in our body, nourishing, purifying, and keeping the flesh pliable. It is so sensitive to what we do - it can speed up from a sound or movement. It can be strengthened when a cause is brought to mind. It can be hurt by stress, physical and mental. I wish I had protected mine more thoroughly, but with what I have left I aspire to foster healthy habits for it - starting with diet, exercise, and meditation.
Always moving, internally massaging, changing, this organ can be opened by positive change or closed by ignorance concerning what is beneficial.