“Just as there are laws of Conservation of Matter and Energy, so there are in fact Laws of Conservation of Pain and Joy. Neither can ever be created or destroyed. But one can be converted into the other.”

“Shared pain is lessened; shared joy, increased—thus do we refute entropy." Stated another way: "Just as there are Laws of Conservation of Matter and Energy, so there are in fact Laws of Conservation of Pain and Joy. Neither can ever be created or destroyed. But one can be converted into the other.”

“The law of conservation of energy, reborn as the law of conservation of mass/energy, has established itself as one of the few unshakable theoretical guideposts in the wilderness of the world of our sense experiences. In scope and generality it surpasses Newton's laws of motion, Maxwell's equations for electricity and magnetism, and even Einstein's potent little E=mc². It comes as close to an absolute truth as our uncertain age will permit.”

“I have learnt through bitter experience the one supreme lesson to conserve my anger, and as heat conserved is transmuted into energy, even so our anger controlled can be transmuted into a power which can move the world.”

“According to the laws of nature, one should destroy the other, but in love neither good nor evil, there is neither construction nor destruction, there is merely movement. And love changes the laws of nature.”

“All the property that is necessary to a man for the conservation of the individual and his propagation of the species is his natural right, which none can justly deprive him of; but all property superfluous to such purposes is the property of the public, who by their laws have created it, and who may therefore by other laws dispose of it, whenever the welfare of the public shall demand such disposition. He that does not like civil society on these terms, let him retire and live among savages.”