The lessons in the volume form a rationale or system of instruction for the unfoldment of the spiritual power (the natural endowment of all souls), commonly designated Clairvoyance.
Lessons include:
Clairvoyance, Its Definition and Office;
Clairvoyance, Its Nature and Law of Manifestation and Expression.
The Trance;
Clairvoyance and Intuition Compared and Correlated;
The Spirit Limited in Matter; The Science of Optics, Materially and Spiritually Considered;
and Vibrations, Their Law in Relation to Light and Sight.