This book, written in 1894, is a fundamental treatment of Steiner's philosophical outlook. Together with Truth and Science and The Riddles of Philosophy it might be considered as one third of a philosophical trilogy. The emphasis of the book is not on “freedom” as ordinarily understood, but is on “freiheit” or what might be termed freeness. This freeness is a self-starting, self-directing activity of a spiritual sort. Here, the term “spiritual” is used in a sense not incompatible with the use of the word in the tradition of the German idealistic school of philosophy.
The main divisions of the book are: Knowledge of Freedom, The Reality of Freedom, and Ultimate Questions.