Traditionally in a Mexican-Catholic family when you are born and you are a female, mom usually starts to imagine the Quince. Not so much for the party, but more about the person that your little girl will be. It's usually agreed that the person they are when they are that age, is the person they are inside, for the rest of their lives.
We are mature enough to handle ourselves in a public domain, but we carry ourselves with a sort of naivety that can easily be misguided and taken advantage of. The sort of innocence and purity that only a child can convey. All while trying to juggle new feelings, relationships and coping with letting go of that innocence.
You become that woman you were born to be. With a white dress, signifying purity, in the church you were baptized you renew your loyalty to God. In front of your loved ones, who bring you this far only to present you to the world.