In secret mantra vehicle, blessing from the guru is very important. Especially in enlightened Mahamudra. In this practice, there is no need for logical analysis or the practice of the breath and channels. Even the generation stage is not emphasized. Although in the practice of Vajrasattva, there is some simple practice of generation stage; this is, however, not essential. At the end of all practices, the essential link to enlightenment is the blessing of the guru. Of course, not just any guru can give this blessing. It has to be a guru who has the power to give blessing. Only then can we receive this blessing.
~Depicted from LUMINOUS WISDOM BOOK SERIES