Most cultures have produced myths wherein the universe emerged from chaos, and light, sound, and form emerged out of darkness. These myths are similar to our concept of the infant's early perceptions based on the study of the Isakower phenomenon and Lewin's dream screen. The darkness is viewed by Trevett as the baby's perception of the world. Out of this darkness comes perception of the mother-breast, the sounds of nursing, and the beginning of personal awareness, which in the myths is equated with world creation.