„Guru“ means teacher, „yoga“ means having knowledge or understanding of one’s own authentic state, the essential condition in which there is nothing to change or modify. We are not judging and thinking. This is the state of the guru. Guruyoga is, then, the main element in the practice of Dzogchen.
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If we go to the essence, the visualization of a single A within a thigle in which the primordial state of Samantabhadra and all our teachers are unified, is called Ati Guruyoga.