Use the paragraph to answer the question. The poor horse was very melancholy, and wandered up and down in the wood, seeking some little shelter from the cold wind and rain. Presently a fox met him: "What’s the matter, my friend?" said he. "Why do you hang down your head and look so lonely and woe-begone?" "Ah!" replied the horse, "justice and avarice never dwell in one house; my master has forgotten all that I have done for him so many years, and because I can no longer work he has turned me adrift and says unless I become stronger than a lion he will not take me back again; what chance can I have of that? He knows I have none, or he would not talk so." Which idea is stated explicitly in the text?