John William Tuohy, No Time to Say Goodbye: A Memoir of a Life in Foster Care

I felt empty a lot and I sometimes had a sense—and I know this sounds strange—that I really had no existence as my own person, that I could disappear and no one would notice or remember that I had ever existed. It is a terrifying thing to live with. I kept myself busy to avoid that feeling, because somehow being busy made me feel less empty.