The most profound and direct teaching of Buddha Shakyamuni's is called Dzogchen, or atiyoga, the clear light great perfection. This is the culmination of all nine vehicles that form the foundation path. Familiarity with ...The most profound and direct teaching of Buddha Shakyamuni's is called Dzogchen, or atiyoga, the clear light great perfection. This is the culmination of all nine vehicles that form the foundation path. Familiarity with its view, meditation and conduct brings unique results.