Introduction

There is a Tibetan saying that just as every valley has its own language so every teacher has his own doctrine. This is an exaggeration on both counts, but it does indicate the diversity to be found within Buddhism and the important role of a teacher in mediating a received tradition and adapting it to the needs, the personal transformation, of the pupil. This diversity prevents, or strongly hinders, generalization about Buddhism as a whole. Nevertheless it is a diversity which Mahayana Buddhists have rather gloried in, seen not as a scandal but as something to be proud of, indicating a richness and multifaceted ability to aid the spiritual quest of all sentient, and not just human, beings.