Buddhist-Meditation-Systematic-and-Practical

Prajna-paramita Sastra that he was commanded by the
Buddha shortly before his Parinirvana to collect
together all the Mahayana teachings. For the faithful
there can be no doubt about this as this sastra was
written by the famous teacher Nagarjuna himself would
be dare to tell a lie? To convince the sceptical is more
difficult, as they may point out that this work was
composed by a champion of the Great Way.
b. Exoteric versus esoteric
In China, Mahayanists have sometimes said that the
Vajrayana is not the Word of the Buddha. They have
been called "heretics," or "outsiders," like followers of
Brahmanism. Such statements are the work of the
ignorant. Unfortunately, very few understood well the
old Vajrayana tradition in China, since knowledge of it
was confined to a few only—to the Emperor and his
court—and did not influence society in general. The
three sages from India who taught it in the Tang dynasty,
Vajrabodhi, Amoghavajra, and Subhakarasinha, knew
the Vajrayana very well, but as it was restricted to a few
people, the unlearned say that it is not Buddhism: they
do not know properly. This must be emphasized
because we want to make very clear the whole and
complete system of the yanas, Three-in-one.
The Sutras on which the old Chinese Vajrayana school
was based (which is the foundation for the present
Shingon-shu in Japan), are also translated into Tibetan,
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