Louis-Claude de Saint-Martin is one of the most eminent of the western mystics, responsible for an illuminative 'Path of the Heart' that has come down to us in the form of Martinism. Throughout the tumultuous days of the French Revolution, Saint-Martin maintained a regular correspondence with Baron Kirchberger, member of the Grand Council of Berne, Switzerland, in which he considers and expounds upon many spiritual and theosophical topics of mutual interest. Less formal than many of his other works, 'Theosophic Correspondence' reveals a more human Saint-Martin, and forms an accessible introduction to the main points of the Unknown Philosopher's spiritual doctrine.