It is all Energy and it is flowing across. In human beings, we take in energy in different forms and the same needs to be let out appropriately to balance out. If this energy is directed for right purpose, then we align with natural forces and if the same energy is used for non-beneficial purposes (for the beings around or environment around), then natural forces try to correct till a time, when they can not correct, but will eliminate the body which is not being used appropriately. This is nothing but acting against set rules, and they are set by Nature. when our body responds inappropriately or health-upheavals are all indicators of this non-alignment. Most of the time, we do not use our intelligence to channelise our energies, that's when we go against the rules. The movement of energy and the our chitta (or way of thinking) must align to ensure the energy flow happens smoothly through us and we become an integral part of the whole.