We Have No Right to Happiness

Where does Lewis say, except in the title, that we have no right to happiness? In his example, the man divorced his wife in order to be happier. This, as Lewis displays, is an awful thing to do, because it is selfish, and in the end, it will be the downfall of our race. But does the man really achieve happiness at all? Perhaps he has a right to happiness. Perhaps he has no right to divorce his wife in order to take another, but Perhaps he has a right to happiness. I say this because I do not think Mr. A will be any happier with his new wife than he was with his old wife. he may experience ecstasy, and it may last for several years, but will he really be happy? If Mr. A is really in love with Mrs. B, then maybe he'll be happy for the rest of his life. But then why wasn't he happy with Mrs. A? I suppose because he wasn't in love with her. But then why did he marry her? The fact is, we live in a fallen world. Just like the boy playing in the mud, we usually can't see the greater good that is being offered to us. Mr. A moved from the muddy sandbox onto the slimy swing perhaps, which made him happy, but perhaps he would have been far happier if he had waited in the muddy sandbox for his father to take him to the shore even after he had lost all interest in the mud.