In the military it is the responsibility of any leader at any level to train their replacement as if they'll be a casualty at any moment. Dictators collect power as if they'll live forever and if they pass their power off to anyone it is usually their children, who they see as the embodiment of themselves.
True happiness is to enjoy the present, without anxious dependence upon the future, not to amuse ourselves with either hopes or fears but to rest satisfied with what we have, which is sufficient, for he that is so wants nothing. The greatest blessings of mankind are within us and within our reach. A wise man is content with his lot, whatever it may be, without wishing for what he has not.
Seneca (Roman philosopher)
