The most vital organ. Controls your life, yet regulated by your lifestyle. Protected by outer mass, yet susceptable to the most brutal of pains. So flexible... expanding and contracting, yet so limited in movement. The greatest providing source that needs even more providing for. Steady for a lifetime, yet silenced in a second... one quick moment. Most powerful, yet the most powerless. Has the might to live, yet weak enough to die. So strong, yet so fragile.
While writing, I kept forgetting which heart I was referring to: the literal heart? or the figurative? So I leave it to be interpreted by my readers.