heart

Each organ of your body is a wondrous gift from God. Each eye has an autofocusing lens. Nerves and muscles control two eyes to make a single three-dimensional image. The eyes are connected to the brain, which records the sights seen.
Your heart is an incredible pump.17 It has four delicate valves that control the direction of blood flow. These valves open and close more than 100,000 times a day--36 million times a year. Yet, unless altered by disease, they are able to withstand such stress almost indefinitely.
Think of the body's defense system. To protect it from harm, it perceives pain. In response to infection, it generates antibodies. The skin provides protection. It warns against injury that excessive heat or cold might cause.
The body renews its own outdated cells and regulates the levels of its own vital ingredients. The body heals its cuts, bruises, and broken bones. Its capacity for reproduction is another sacred gift from God.
Russell M. Nelson

- Russell M. Nelson - Today Quotes