p.vi
The purpose of this book is to show as clearly as possible that there is an essential unity in all religions; that there is no difference in the truths inculcated by the various faiths; that there is but one method by which the world, both external and internal, has evolved; and that there is but one Goal admitted by all scriptures.

p.ix
The book is divided into four sections, according to the four stages in the development of knowledge. The highest aim of religion is Atma-jnanam, Self-knowledge. But to attain this, knowledge of the external world is necessary. Therefore the first section of the book deals with veda (the gospel), and seeks to establish fundamental truths of creation and to describe the evolution and involution of the world.

All creatures, from the highest to the lowest in the link of creation, are found eager to realize three things: Existence, Consciousness, and Bliss. These purposes or goals are the subject for discussion in the second section of the book.  The third section deals with the method of realizing the three purposes of life. The fourth section discusses the revelations which come to those who have traveled far to realize the three ideals of life and who are very near their destination.

p.x

The sun, with its planets and their moons, takes some star for its dual and revolves round it in about 24,000 years of our earth...The sun also has another motion by which it revolves round a grand center called Vishnunabhi, which is the seat of the creative power, Brahma, the universal magnetism. Brahma regulates dharma, the mental virtue of the internal world.

When the sun in its revolution round its dual comes to the place nearest to this grand center, the seat of Brahma...dharma, the mental virtue, becomes so much developed that man can easily comprehend all, even the mysteries of Spirit.

...After 12,000 years, when the sun goes to the place in its orbit which is farthest from Brahma...dharma, the mental virtue, comes to such a reduced state that man cannot grasp anything beyond the gross material creation. Again, in the same manner, when the sun in its course of revolution begins to advance toward the place nearest to the grand center, dharma, the mental virtue, begins to develop; this growth is gradually completed in another 12,000 years.

p. xi

Each of these periods of 12,000 years brings a complete change, both externally in the material world, and internally in the intellectual or electric world, and is called one of the Daiva Yugas or Electric Couple. Thus, in a period of 24,000 years the sun completes the revolution around its dual and finishes one electric cycle consisting of 12,000 years in an ascending arc and 12,000 years in a descending arc.

p. xiii
Development of dharma, the mental virtue, is but gradual and is divided into four different stages in a period of 12,000 years...Kali Yuga...dharma, the mental virtue, is then in its first stage...the human intellect cannot comprehend anything beyond the gross material of this ever-changing creation, the external world...Dwapara Yuga...dharma, the mental virtue, is then in the second stage...the human intellect can then comprehend the fine matters or electricities and their attributes which are the creating principles of the external world...Treta Yuga...dharma, the mental virtue, is then in the third stage; the human intellect becomes able to comprehend the divine magnetism, the source of all electrical forces on which the creation depends for its existence...Satya Yuga...dharma, the mental virtue, is then in its fourth stage and completes its full development; the human intellect can comprehend all, even God the Spirit beyond this visible world.

p. xxi
The five sorts of electricity can be easily understood if one will direct his attention to the nerve properties, which are purely electrical in nature. Each of the five sensory nerves has its characteristic and unique function to perform. The optic nerve carries light and does not perform the functions of the auditory and other nerves; the auditory nerve in its turn carries sound only, without performing the functions of any other nerves, and so on. Thus it is clear that there are five sorts of electricity, corresponding to the five properties of cosmic electricity.

So far as maggnetic pproperties are concerned, the grasping power of the human intellect is at present so limited that it would be quite useless to attempt to make the matter understood by the general public...There are indeed exceptional personages now living who, having overcome the influence of Time, can grasp today what ordinary people cannot grasp; but this book is not for those exalted ones, who require nothing of it.