Nature loves efficiency, which is very odd for something supposedly working at random. When you drop a ball, it falls straight down without taking any unexpected detours. When two molecules with the potential for bonding meet, they always bond- there is no room for indecision. This expenditure of least energy, also called the law of least effort, covers human beings, too. Certainly our bodies cannot escape the efficiency of the chemical processes goings on in each cell, so it is probable that our whole being is wrapped up in the same principle. This argument also applies to personal growth- the idea that everyone is doing the best he or she can from his or her own level of consciousness