"He awakes in a mindless terror of the silence, the motionlessness. He screams. He is afire from head to foot with want, with desire, with intolerable impatience. He gasps for breath and screams until his head is filled and throbbing with the sound. He screams until his chest aches, until his throat is sore. He can bear the pain no more and his sobs weaken and subside. He listens. He opens and closes his fists. He rolls his head from side to side. Nothing helps. It is unbearable. He begins to cry again, but it is too much for his strained throat; he soon stops. He waves his hands and kicks his feet. He stops, able to suffer, unable to think, unable to hope. Then he falls asleep again." I think this description from Jean Liedloff is very convincing and very heartbreaking. Babies cannot know that their parents are in the next room.