LIBER O VEL MANVS ET SAGITTAE SVB FIGVRA vI I 1. This book is very easy to misunderstand; readers are asked to use the most minute critical care in the study of it, even as we have done in its preparation. 2. In this book it is spoken of the Sephiroth and the Paths ; of Spirits and Conjurations; of Gods, Spheres, Planes, and many other things which may or may not exist. It is immaterial whether these exist or not. By doing certain things certain results will follow; students are most earnestly warned against attributing objective reality or philo- sophic validity to any of them. 3. The advantages to be gained from them are chiefly these: (a) A widening of the horizon of the mind. (8) An improvement of the control of the mind. 4. The student, if he attains any success in the following practices, will find himself confronted by things (ideas or 13