Introspectively you can break yourself down into four basic parts.
The body is muscles, valves, blood flow, and also your brain. It is the “embodiment” of your physical and mental potential including your capacity to learn. It's what's physical and is connected to your genetics.
Your heart is a ball of emotion, which like a sun, lashes out with solar flares from time to time. It is a highly reactive force that wafts left and right, up and down.