Acquire the contemplative way of seeing how all things change into one another, and constantly attend to it, and exercise thyself about this part of philosophy. For nothing is so much adapted to produce magnanimity. Such a man has put off the body, and as he sees that he must, no one knows how soon, go away from among men and leave everything here, he gives himself up entirely to just doing in all his actions, and in everything else that happens he resigns himself to the universal nature.