XXV. By nothing did Furnius gain greater credit with Augustus, and make it easy for him to obtain anything else for which he might ask, than by merely saying, when at his request Augustus pardoned his father for having taken Antonius's side, "One wrong alone I have received at your hands, Caesar; you have forced me to live and to die owing you a greater debt of gratitude than I can ever repay." What can prove gratitude so well as that a man should never be satisfied, should never even entertain the hope of making any adequate return for what he has received? By these and similar expressions we must try not to conceal our gratitude, but to display it as clearly as possible. No words need be used; if we only feel as we ought, our thankfulness will be shown in our countenances. He who intends to be grateful, let him think how he shall repay a kindness while he is receiving it. Chrysippus says that such a man must watch for his opportunity, and spring forward whenever it offers, like one who has been entered for a race, and who stands at the starting-point waiting for the barriers to be thrown open; and even then he must use great exertions and great swiftness to catch the other, who has a start of him. XXVI. We must now consider what is the main cause of ingratitude. It is caused by excessive self-esteem, by that fault innate in all mortals, of taking a partial view of ourselves and our own acts, by greed, or by jealousy. Let us begin with the first of these. Every one is prejudiced in his own favour, from which it follows that he believes himself to have earned all that he receives, regards it as payment for his services, and does not think that he has been appraised at a valuation sufficiently near his own. "He has given me this," says he, "but how late, after how much toil? how much more might I have earned if I had attached myself to So and so, or to So and so? I did not expect this; I have been treated like one of the herd; did he really think that I only deserved so little? why, it would have been less insulting to have passed me over altogether."