If you consider that the principle of harmony and benevolence is necessary to the very existence of families and states, you will understand how high a thing is friendship, in which that harmony and benevolence reach their perfect flower. There was a philosopher of Agrigentum who explained the properties of matter and the movements of bodies in terms of affection and repulsion; and however that may be, everyone knows that these are the real forces in human life. Who does not applaud the friendship that shares in mortal dangers, whether in real life or in the play? SCÆVOLA: You speak highly of friendship. What are its principles and duties? LÆLIUS: Do we desire a friend because of our own weakness and deficiency, in order that we may obtain from him what we lack ourselves, repaying him by reciprocal service? Or is all that only an incident of friendship, and does the bond derive from a remoter and more beautiful origin, in the heart of Nature herself? For my part, I take the latter view. Friendship is a natural emotion, and not an arrangement of convenience. Its character may be recognised even in the lower animals, and much more plainly in the love of human parents for their children, and, most of all, in our affection for a congenial friend, whom we see in an atmosphere of virtue and worth. The other is not an ignoble theory, but it leaves us in the difficulty that if it were true, the weakest, meanest, and poorest of humanity would be the most inclined to friendship. But it is the strong, rich, independent, and self-reliant man, deeply founded in wisdom and dignity, who makes great friendships. What did Africanus need of me, or I of him? Advantages followed, but they did not lead. But there are people who will always be referring everything to the one principle of self-advantage; they have no eyes for anything great and god-like. Let us leave such theorists alone; the plain fact is, that whenever worth is seen, love for it is enkindled. Associations founded upon interest presently dissolve, because interest changes; but Nature never changes, and therefore true friendships are imperishable. Scipio used to say that it was exceedingly difficult to carry on a friendship to the end of life, because the paths of interest so often diverge. There may be competition for office, or a dishonorable request may be refused, or some other accident may be fatal to the bond. This refusal to join in a nefarious course of action is often the end of a friendship, and it is worth inquiring how far the claims of affection ought to extend. Tiberius Gracchus, when he troubled the state, was deserted by almost all his friends; one of them who had assisted him told me that he had such high regard for Gracchus that he could refuse him nothing. "But what," said I, "if he had asked you to set fire to the capitol?" "I would have done it!"