This is a book on love, integrating the human aspects of it with its divine essence. Spiritual liberty is a prerequisite for this integration. It refers to a state where one is no longer dependent on outer circumstances and on the fancies of one's mind.
Therefore, it is also a book on the spiritual path which leads man from imperfection to perfection, from self consciousness to ever-flowing sympathy. It is the path of the unfoldment of the soul. The soul is the lightning spark of the Divine Sun within ourselves. It is the most original part of our being, which will be the only part lasting forever, ultimately unified in its divine origin. Thus it is a book on birth and death also, on life here and in the hereafter, on reincarnation and spiritism.
All these items are treated from both the philosophical and the psychological points of view, and integrated by the mystical perspective.