Do you know anything about Traditional Chinese Medicine (TCM)? Think acupuncture, and even by extension Tai Chi and Qi Gong.
Recently I learned about a cool TCM concept, dantian.
Dantian are power centers in our bodies, similar to chakras. There are only three, known as: upper, middle and lower.
The upper dantian (shen) is said to relate to spirit and intelligent consciousness. It is located on the body approximately where your 3rd eye is.
The middle dantian (qi/chi) is known as the home of universal energy and sits right around the heart chakra, in the center of your chest. This one is directly linked to the idea of life force.