Sant Kirpal Singh: The study of comparative yoga was initially stimulated by the various queries on the subject which kept pouring in from seekers and disciples in the West. But in trying to answer them in a systematic and comprehensive manner, it has grown into something much larger than its original intent. As it has now evolved it may, I hope, be of service not only to those whose questions first led to its writing, but to all seekers in general who wish to understand what yoga is, the varieties of its forms and their respective modes and spiritual efficacy.
