Again from Alice Bailey's "Treatise on White Magic". What it means to say "that in which we live and move and have our being":
"From certain aspects, therefore, that process indicates man's unity with everything that is material; it demonstrates that he is part of nature itself and by nature we mean the body of the one life in whom "we live and move and have our being". In those three words—living, moving and being—we have the entire story. Being is awareness, self consciousness and self -expression and of this man's head and brain are the exoteric symbols. Living is energy, desire in form, coherence and adhesion to an idea and of this the heart and the blood are the exoteric symbols. Moving indicates the integration and response of the existing, aware, living entity into the universal activity, and of this the stomach, pancreas and liver are the symbols."