One of the most important lessons it learns is the danger of vanity. The evil queen wants Snow White dead because she can not accept the fact that she is not the most beautiful woman in the kingdom. But it is this vanity that destroys her in the end.
The concept of true beauty is another topic discussed in this story. The evil queen may be beautiful on the outside, but she is evil and ugly on the inside. Snow White, on the other hand, is beautiful both inside and out. Perhaps the mirror mentions her as the fairest of all not because of her physical beauty, but because of this true beauty. The queen will never be as beautiful as Snow White because her heart is not pure. Therefore, the idea that true beauty comes from within is also discussed in this fairy tale.