The life force energy, chi, is a part of everything, and everyone.
Feng Shui focuses on the flow of chi in our environments, and the effect this has upon our inner selves. Other disciplines also focus on chi, such as martial arts, acupuncture, tai chi, and yoga. When the chi flows freely throughout our bodies, we feel best.
Skeptics of chi will doubt the legitimacy of this concept, however, that does not make it false. While chi cannot be seen, it can certainly be felt.
One of my favorite, and easiest demonstrations of feeling chi involves a square or rectangular table. Sit where the corner faces you, next, sit at the flat side of the table. One is noticeably more uncomfortable. In Feng Shui, we call that "sha chi".
Bathrooms are famous for being labeled "bad Feng Shui", although there really is no bad Feng Shui. The reason bathrooms get a bad wrap is because of all of the negative energy that is "flushed" down. Notice that after a toilet is flushed, the room feels empty. This is specially true in public restrooms, the room doesn't feel fresh, rather stale. This is an example of an absence of chi.
People have noticed the benefits of acupuncture. They will feel better after a session due to the flow of chi in their bodies. The acupuncturist uses needles to release areas in the body that are stagnant or blocked.
Yoga is another great activity for managing chi flow internally. The postures and poses encourage good energy flow throughout the body.
Feng Shui teaches us that the outer world reflects the inner world. A cluttered space often reflects a cluttered mind. Open up your space, open up your possibilities.