The White Witch played on Ed’s cravings for pleasure and importance. She magically gives him enchanted Turkish Delight, and the more he eats, the more he wants.(anybody been there?) She promised to make him a King of Narnia, and then he could eat all the Turkish delight he wanted. (Sound familiar? Gen.3:5-6)
There’s another thing about sin; it’s always a distortion of God’s good plan.
Edmund was destined to be a King of Narnia. Jadis knows it! The Witch promised him the same thing, but by the wrong route.
In a similar way, we go looking for good things, but in all the wrong ways, contrary to God’s design. Sin is rebellion vs the recipe of God.