No one worries about you like your mother, and when she is gone, the world seems unsafe, things that happen unwieldy. You cannot turn to her anymore, and it changes your life forever. There is no one on earth who knew you from the day you were born; who knew why you cried, or when you'd had enough food; who knew exactly what to say when you were hurting; and who encouraged you to grow a good heart. When that layer goes, whatever is left of your childhood goes with her.
Isn't this the truth of any good mother? That in all of our lives. We worry only about those we brought into this world, regardless of whether they loved us back or treated us fairly or understood our shortcomings.