seek in this book to do four things, and to make appeal to three types of people. It is based, as regards its teaching, upon four fundamental postulates. These are intended to:

1. Teach the laws of spiritual psychology as distinguished from mental and emotional psychology.

2. Make clear the nature of the soul of man and its systemic and cosmic relationships. This will include its group relationship as a preliminary step.

3. Demonstrate the relations between the self and the sheaths which that self may use, and thus clarify public thought as to the constitution of man.

4. Elucidate the problem of the supernormal powers, and give the rules for their safe and useful development.