Four yogas (Tib. རྣལ་འབྱོར་བཞི་, naljor shyi, Wyl. rnal 'byor bzhi) — four stages of attainment in the meditation practice of Mahamudra.
- one-pointedness (Tib. རྩེ་གཅིག་, tsé chik; Wyl. rtse gcig), which establishes the state of shamatha
- simplicity (Tib. སྤྲོས་བྲལ་, trödral; Wyl. spros bral), which is reached through the clear seeing of vipashyana
- one taste (Tib. རོ་གཅིག་, ro chik; Wyl. ro gcig), when shamatha and vipashyana become one
- non-meditation (Tib. སྒོམ་མེད་, gom mé; Wyl. sgom med) is reached when one goes beyond the mind, and beyond the concept of a meditator meditating, the level of Dzogchen.
- Tsele Natsok Rangdrol, The Heart of the Matter, Rangjung Yeshe Publications, 1996
- Tsele Natsok Rangdrol, Lamp of Mahamudra, Shambhala, 1989
- Herbert V. Guenther, Meditation Differently, The Māhamudrā Approach: The Four Tuning-in Phases, 1992.