Spirit is the connection you make with God!
That connection is made with your conscious mind directing your subconscious that connects with spirit/God.
Your spirit is the part of you that is not physical and that consists of your character and feelings. The human spirit is virtually indestructible.
When directed by you, using your conscious mind, Spirit allows you to make the day to day decisions and choices that result in physical healing and mental wellness.
Your natural healing and holistic health is greater than what you could experience without Him.
The good news is that connection is always there and open for you. The bad news is that, for most humans, it is hard to connect to.