The most fundamental teachings that point the mind toward freedom—the authentic, non-dual realization of the primordial state—are those of the Great Perfection (Atiyoga). In the root text, The Cuckoo of Pure Presence, it is said:
The nature of the infinite variety of phenomena is without duality,
since, each thing in itself (singularity) is beyond all concepts and limits of the mind.
The natural condition, suchness as-it-is, is beyond conceptual elaboration,
yet manifesting as all diversity of form - the radiance of Samantabhadra, all-good.
All is self-perfected in actuality, so the sickness of effort is liberated,
remain free and natural in the contemplation of spontaneous total presence.
The Ground of Reality, which is identical to our own ground of being, is the natural condition beyond all conceptual elaboration. The vibrant, responsive, and dynamic nature of this Ground shimmers as a timeless, infinite display. When this is realized, it is awakening; when it is not, the dualistic universe appears. In this sense, the Ground is the Great Source of all manifestations, whether they appear as sentient beings or Buddhas.
However, all appearances are, in reality, beyond both duality and non-duality. The vision of duality (the belief in truly existent subjects and objects) and the notion of non-duality (in the sense of a singular "oneness") are both extremes. Neither is the primordial state.
The true condition is non-dual only in the sense that there are "no two." The perception of an individual "locus of existence"—the observer or experiencer—is a mere illusion; it is simply the radiance of primordial awareness contracted into the experience of a separate self. Yet, there is also no "oneness" or "single thing." In the vast, free-flowing expanse of the fundamental condition, not even a hint of objective "thing-ness" can be found to be either one or two.
The teachings of Atiyoga point us toward the direct discovery of this authentic condition. In the moment of pure presence where subject and object collapse, the clarity of the Pure Ground is revealed as Great Spontaneity. The "sickness of effort" mentioned in the text refers to the idea that awakening is produced by a cause, for nothing that is attained through effort can be the ultimate state.
Conversely, it would be a mistake to assume liberation occurs randomly without any means of discovery. While the true path is "non-doing," a conditioned mind does not yet understand what non-doing means. Thus, while there is no cause for awakening, there is an apparent unveiling. This occurs through learning and contemplation, in conjunction with skillful methods for self-discovery. This is the path of Atiyoga.
