The steps you take towards the goal by accomplishing your desires, your patience in doing this, your perseverance with it, these are what teach you. One may compare it with playing with dolls. The child who plays with a doll is learning to be a mother; learning how to be kind to children, putting them to bed, waking them up and dressing them. When once a little girl has learned this she will later be a good mother; this means she will accomplish her desire.