"Whoever is greedy for unjust gain troubles his own [self]..." Proverbs 15:27 ESV
"Digory was just turning to go back to the gates. . . when he got a terrible shock. He was not alone. There, only a few yards away from him, stood the Witch. She was just throwing away the core of an apple she had eaten. The juice was darker than you would expect and had made a horrid stain around her mouth. Digory. . . began to see that there might be some sense in that last line about getting you heart's desire and getting despair along with it. For the Witch looked stronger and prouder than ever, and even, in a way, triumphant; but her face was white, deadly white, as white as salt. . . "Things always work according to their nature. She had won her heart's desire; she has unwearying strength and endless days like a goddess. But length of days with an evil heart is only length of misery and already she begins to know it. All get what they want; they do not always like it." said Aslan. . . "The fruit always works-it must work-but it does not work happily for any who pluck it at their own will. If any Narnian, unbidden, had stolen an apple and planted it here to protect Narnia, it would have protected Narnia. But it would have done so by making Narnia into another strong and cruel empire like Charn, not the kindly land I meant it to be. And the Witch tempted you to do another thing, my son, did she not?" "Yes, Aslan. She wanted me to take an apple home to Mother." "Understand, then that it would have healed her; but not to your joy or hers. The day would have come when both you and she would have looked back and said it would have been better to die in that illness." And Digory could say nothing, for tears choked him, and he gave up all hopes of saving his Mother's life; but at the same time he knew that the Lion knew what would have happened, and that there might be things more terrible even than losing someone by death. But now Aslan was speaking again, almost in a whisper: "That is what would have happened, child, with a stolen apple. It is not what will happen now. What give you now will bring joy. It will not, in your world, give endless life, but it will heal. Go. Pluck her an apple from the Tree." . . . "Please," he said, "may we go home now?" He had forgotten to say "Thank you," but he meant it, and Aslan understood.
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And then- Mother well again. Everything right again.
-"The Magician's Nephew", pages 190, 191, 208, 209 and 100