This book originated in lectures Steiner gave to a small circle of
theosophists and constitutes the earliest public exposition of his
spiritual scientific research. In it Steiner deals with the impact
of modern scientific thinking on our spiritual experiences and the
conflict between reason and revelation. He looks at how 11 European
mystics resolved the dichotomy between their inner spiritual perceptions
and individual freedom and the age of invention and discovery then coming
to birth.