This collection of essays from the members of the Pedagogical Section Council of North America (PSC) and former Pedagogical Section Leader, Florian Osswald addresses contemporary research on the work that human beings continue while sleeping. Rhythms, movement, healing forces, the threshold between sleeping and waking are among the subjects addressed in this significant little tome. Waldorf educators have long held the sleep of students in an important place in understanding effective teaching and here is collected some of the many reasons why. While sleep will remain forever mysterious, illumination is possible and herein collected.