The following is respectfully quoted from “Excellent Path to Enlightenment” by His Holiness Dilgo Khyentse Rinpoche:
In the so-called preliminary or foundation practice, the most extraordinary section is Guru Yoga, or “union with the Guru’s nature.” It is through this practice that primordial wisdom can arise instantly in one’s being.
Guru Yoga is the way to pray to an authentic teacher and express our deep and unchanging devotion. Through devotion, our minds and the Guru’s mind become one. Why is this practice necessary? Because there is not a single Buddha in the past, present, or future who has achieved or will achieve enlightenment without relying on a spiritual teacher. Whichever of the nine vehicles of the Buddhist teachings we practice, we have to rely on a spiritual teacher, receive his or her teaching and practice according to his or her instructions. There is no other way.
Even if we have met a teacher and received his instructions, however, we will never be able to receive his blessings if we do not have fervent devotion and complete confidence in him and his teachings. And without his blessings we will not progress along the path. First of all, therefore, we need to generate devotion.
Devotion rarely comes spontaneously in the beginning. We have to generate and nurture it. First, for example, when we hear about the teacher and his life, we think about his marvelous enlightened qualities. Then, when we meet him, we see that those qualities are authentic, and our confidence and faith grow stronger and stronger. Our prayers become more and more profound, and his blessings begin to penetrate us more and more deeply.
All accomplishments are due to the Guru’s blessings. We are not referring here to minor accomplishments like obtaining good health, long life, or wealth, but to the supreme realization of the Guru’s enlightened nature, which is none other than our own Buddha-nature.
THE VISUALIZATION
As an aid to generating devotion, the text contains the following verse:
Before me in the sky, in an expanse of rainbow light,
Is my root teacher, Pema Thötrengtsal,
Surrounded by the ocean of Knowledge Holders of the three transmissions.
He is the union of all objects of refuge.