Buddhist-Meditation-Systematic-and-Practical

a. The difference concerns the outer initiation. In
anuttarayoga the guru who gives the wang ("initiation"
in Tibetan) whether with or without a consort, must
visualize himself in the heruka-form. From his union in
this form, he obtains some vajra-love nectar for the
initiation. In Japanese Tantra, this practice is unknown
and only fragrant water is used.
b. In the inner initiation, the disciple also visualizes
himself in the heruka-form regardless of whether he has
or has not a yogic partner. In the first anuttarayoga
initiation, which particularly concerns the body, the
guru is visualized with light coming from his vajra
(male organ). This light comes out in the form of a hook
which is inserted into the disciple's heart. There it hooks
onto the eighth consciousness visualized in the form of
the yidam and this is then withdrawn into the median
channel of the guru's body. From there it passes into the
lotus (female organ) of the dakini. From the dakini's
womb, the disciple's consciousness is reborn as a heruka
son. Such a process is absent in the third yoga.
c. There is a complete classification of the bodhicitta
into five sorts in the anuttarayoga while in yogatantra
only four are known. They are as follows:
i. Citta of will—corresponds to the nirmanakaya
ii. Citta of conduct—corresponds to the sambhogakaya
iii. Citta of victorious significance—corresponds to the
Dharmakaya
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