One can never fathom an emotion or divine its dictates by standing outside of it. From within it, however, all incomprehensibilities are solved, and what was so enigmatic from without becomes transparently obvious. Each emotion obeys a logic of its own, and makes deductions which no other logic can draw. Piety and charity live in a different universe from worldly appetites and ambitions, and form another centre of energy altogether. A supreme love may turn sacrifices into joys; a supreme trust may render normal precautions despicable; and in certain transports of generosity it may appear unspeakably mean to retain hold of personal possessions.