My most dear, most kind, most precious, wish-fulfilling one,
In the six-session guru yoga, the guru is Vajradhara; you have to think the essence is Buddha, so that means having no mistakes, only realizations. You have to think that from your side. Then [the guru in the] aspect of Vajradhara, in the nature of light, is absorbed into your heart.
There is gross, subtle and extremely subtle body and mind—so, the guru’s holy body, speech and mind absorbs into your extremely subtle body and mind, and becomes oneness with that. Meditate a little on that oneness, infinite bliss, nondual with emptiness. Then you can think, “this is I.” Meditate for a little while on that. Then you become Vajradhara.
With much love and prayers ...