Within the depth-psychology and sinological corpus assembled in this library, yang and yin function not merely as cosmological categories but as the foundational polarity through which psyche, cosmos, and practice are organized. The passages range from Jung's explicit identification of yang with the male principle and yin with the female principle — approached through the lens of the collective unconscious — to the exhaustive technical elaborations of the I Ching commentators, for whom the interplay of these two forces governs every hexagram, every moment of alchemical work, and every movement of inner cultivation. Richard Wilhelm situates the yang-yin dialectic as the engine of change itself, the alternating light and dark whose interaction explains all phenomena yet leaves a residue — spirit — that neither pole alone can account for. The Taoist I Ching commentators, particularly Liu I-ming as rendered by Thomas Cleary, press the distinction further, mapping yang onto the 'mind of Tao' and yin onto the conditioned 'human mentality,' thereby interiorizing the cosmic polarity as a soteriological programme. Campbell reads the yang-yin duad comparatively, noting its structural analogy to the Indian linga-yoni while insisting on the distinctively Chinese tendency toward abstract, geometric rather than overtly sexual symbolization. The central tension across all positions is whether yang and yin are ultimately reconcilable — resolved into a higher unity — or whether their perpetual contest is itself the generative condition of all existence.
The entire I Ching is concerned with the relationship between yin and yang. Yin and yang represent two aspects. In the yang aspect, there are yin features and yang features.
This passage articulates the foundational principle that yang and yin are not absolute opposites but interpenetrating aspects, each containing the seed of the other, a dialectic that governs the entire I Ching system.
, The Complete I Ching: The Definitive Translation, 1998thesis
underlying all is the elementary principle of a dialectic of two forces, yang and yin — which, in a way, is analogous to the Indian of the liṅgaṃ and yoni.
Campbell locates yang and yin as the structural bedrock of Chinese mythology, comparing and distinguishing them from Indian sexual dualism while emphasizing the Chinese preference for abstract geometrical symbolization.
, Oriental Mythology: The Masks of God, Volume II, 1962thesis
the world of yin. But in addition to this rigid world of number, there are living trends... the world of light — the realm of yang — is to keep the changes in motion in such a manner that no stasis occurs.
Wilhelm characterizes yin as the fixed, deterministic world of number and yang as the dynamic world of living transformation, with the secret of Tao being the perpetual maintenance of yang's regenerative motion.
, The I Ching or Book of Changes, 1950thesis
the more we approach certain concepts of Chinese philosophy expressed in Yang, the male principle, and Yin, the female principle.
Jung explicitly connects his analytical categories of activity and passivity in the collective unconscious to the Chinese philosophical concepts of Yang as the male principle and Yin as the female principle.
, Dream Analysis: Notes of the Seminar Given in 1928-1930, 1984thesis
The mind of Tao is in this text associated with 'celestial' yang, in contrast to the 'human mind,' or human mentality, associated with 'mundane' yin.
The Taoist alchemical tradition, as presented by Cleary's translation of Liu I-ming, internalizes the yang-yin polarity as a psychological and soteriological distinction between the illumined mind of Tao and the conditioned human mentality.
, The Taoist I Ching, 1986thesis
The mind of Tao is in this text associated with "celestial" yang, in contrast to the "human mind," or human mentality, associated with "mundane" yin.
Liu I-ming's own text establishes the same internalized yang-yin polarity, aligning yang with the primordial mind of Tao and yin with the unstable, conditioned human mentality.
, The Taoist I Ching, 1986thesis
When yin culminates, yang is born; there is yang within yin — this is called 'a companion comes.' If yin does not culminate, yang is not born.
Liu I-ming articulates the cyclical interdependence of yin and yang — yang is generated at the culmination of yin — framing the polarity as a dynamic process of mutual arising essential to alchemical practice.
, The Taoist I Ching, 1986thesis
as a path does not mean avoiding yin, nor does it mean sitting there watching the way things turn out; it means using yin to complete yang.
The Taoist I Ching insists that the path of cultivation requires the active use of yin to complete yang, not the suppression of yin, revealing the non-dualistic logic underlying the polarity.
, The Taoist I Ching, 1986thesis
the polar tension between the sexes originating in the fundamental antithesis of cosmic forces. Later in the Book of Changes this polar tension finds a more abstract expression in concepts that are farther removed from mythological
Hellmut Wilhelm traces the evolution of the yang-yin polarity from mythological animal symbols toward an abstract conceptual framework, emphasizing its origin in cosmic sexual tension.
, Change: Eight Lectures on the I Ching, 1960supporting
so as to elucidate the source of essence and life, the reality and falsehood of yin and yang, the laws of cultivation and practice, the order of work.
The alchemical tradition identifies the discernment of true from false yin and yang as central to the entire project of Taoist self-cultivation and inner work.
, The Taoist I Ching, 1986supporting
what does not allow yang to avoid turning to yin is the circulating energy mechanism of heaven and earth; yet what is able to preserve yang in the midst of yin is the power of the practice of reverse operation of sages.
Liu I-ming frames the yang-yin alternation as cosmically inevitable but identifies the sage's reversal practice as the means by which yang vitality can be preserved against the natural entropic drift toward yin.
, The Taoist I Ching, 1986supporting
yin and yang fragment, and the previous accomplishment all goes to waste. Danger is then unavoidable.
The fragmentation of yin and yang — their failure to maintain proper relational balance — is presented as the ultimate danger in alchemical practice, resulting in the dissolution of all prior spiritual achievement.
, The Taoist I Ching, 1986supporting
He who knows the male, yet cleaves to what is female, Becomes like a ravine, receiving all things under heaven; And being such a ravine, He knows all the time a power that he never calls upon in vain.
Jung cites the Tao Te Ching's image of knowing the male while cleaving to the female as an expression of the transcendent integration of yang and yin opposites in the figure of the perfected sage.
, Psychological Types, 1921supporting
Qian [Pure Yang] means strength and dynamism; Kun [Pure Yin] means submissiveness and pliancy.
Wang Bi's commentary establishes the fundamental trigram equivalences through which yang and yin are systematically embodied as dynamic strength and compliant pliancy throughout the I Ching.
, The Classic of Changes: A New Translation of the I Ching as Interpreted by Wang Bi, 1994supporting
the contest between the mind of Tao and the human mentality is a matter of a hairbreadth — on this side, the mind of Tao, on that side, the human mentality.
Liu I-ming's commentary renders the yang-yin contest as an intimate interior drama, a razor's-edge distinction between the celestial and the earthly operating within the practitioner's own consciousness.
, The Taoist I Ching, 1986supporting
one must have flexibility within firmness, and firmness within flexibility, parting gradually, advancing a portion of celestial energy, repelling a portion of mundanity.
The Taoist alchemical path requires that yang and yin interpenetrate even as one refines the other — firmness within flexibility and vice versa — articulating a non-dualistic praxis.
, The Taoist I Ching, 1986supporting
causing yin to retreat requires mutual assistance of inside and outside.
The process of bringing yin into proper subordination to yang is not unilateral but requires the coordinated cooperation of inner cultivation and outer circumstance.
, The Taoist I Ching, 1986supporting
the final world principle, which antedates realization and is not yet divided by the drawing apart of the opposites on which emergence into reality depends.
Wilhelm's commentary on the Secret of the Golden Flower situates the Tao as the pre-differentiated unity that precedes the yang-yin division, which is itself the condition for the emergence of manifest reality.
, The Secret of the Golden Flower: A Chinese Book of Life, 1931aside
When one yang subtly arises, all the yangs have motivation. This is like pulling out the connected root of a reed, bringing other reeds with it.
Liu I-ming employs a botanical image to convey the systemic interconnection of yang energies — the arising of one yang activates all yang — illustrating the holistic logic of the polarity.
, The Taoist I Ching, 1986aside
Six and eight, even numbers, indicate yin yao. Seven and nine, odd numbers, indicate yang yao.
Alfred Huang provides the technical numerical basis by which yin and yang are distinguished in the casting process, grounding the metaphysical polarity in the concrete divination procedure.
, The Complete I Ching: The Definitive Translation, 1998aside