The mantra vehicle is the most common name in Tibet for the path of meditation practice following the “Books of Kiu-te,” or the Tibetan Buddhist Tant… - David Reigle

One of the most defining teachings of Tibetan Buddhism is the teaching of the path to Buddhahood in terms of five... is taught in the Abhisamayalankara, the single most widely studied book in Tibet. This book is said to have been received from the future Buddha, Maitreya... It was memorized by the monks of virtually all the monasteries; and most of the great Tibetan teachers wrote commentaries on it...

While the idea of initiation is not new, these teachings on the initiations are not found in the earlier Theosophical writings of Blavatsky, but are considered by many to have originated with Bailey.

Now that so many of the Northern Buddhist scriptures have become available, the opportunities to study and interpret them in light of Theosophy as sourcebooks of the Wisdom-Religion are very great indeed.