"Conservation of energy" Quotes from Famous Books
 ... of evolution there reigns an absolutely general law, that of the "persistence of force." By this Spencer sometimes means the phenomenal law of conservation of energy, sometimes the metaphysical principle that the quantity of existence is unalterable, sometimes the logical principle that nothing can happen without a reason, sometimes the practical postulate that in the absence of any assignable difference you must call a thing the same. This law is one ...
— Memories and Studies • William James |
