Sarah Ruhl said this quote

Every day as I wave to my children when I drop them off at school, or let one of them have a new experience—like crossing the street without holding my hand—I experience the struggle between love and non-attachment. It is hard to bear—the extreme love of one’s child and the thought that ultimately the child belongs to the world. There is this horrible design flaw—children are supposed to grow up and away from you; and one of you will die first.