Mental or spiritual health, which is rationality, makes for progress, and the future demands greater and greater mental or spiritual health, greater and greater rationality. The brain must dominate and direct both the individual and society in the time to come, not the belly and the heart.
Jack LondonBut it did not all happen in a day, this giving over of himself, body and soul, to the man-animals. He could not immediately forego his wild heritage and his memories of the Wild. There were days when he crept to the edge of the forest and stood and listened to something calling him far and away.
Jack LondonBut nobody else ever romped with White Fang. He did not permit it. He stood on his dignity, and when they attempted it, his warning snarl and bristling mane were anything but playful. That he allowed the master these liberties was no reason that he should be a common dog, loving here and loving there, everybody's property for a romp and good time. He loved with single heart and refused to cheapen himself or his love.
Jack LondonLove cannot in its very nature be peaceful or content. It is a restlessness, an unsatisfaction. I can grant a lasting love just as I can grant a lasting unsatisfaction; but the lasting love cannot be coupled with possession, for love is pain and desire and possession is easement and fulfilment.
Jack London