The Tao or Dao (Chinese: 道; pinyin: dào; Jyutping: dou6) is the source and fundamental principle of the universe,Oxford Reference - TaoMerriam-Webster.com Online Dictionary - Tao primarily as conceived in East Asian philosophy and religions. The concept is represented by the Chinese character , which has meanings including 'way', 'path', 'road', and sometimes 'doctrine' or 'principle'.

According to its foundational book Tao Te Ching, Tao is self-existent, formless, eternal, omnipresent, and is the source of all existence. While all phenomena in the universe change continuously, Tao, as the source of all, remains motionless and changeless intrinsically:

Tao is also described as invisible, intangible, and beyond intellectual understanding, as it is written in Tao Te Ching:

The Tao Te Ching has two parts, the Tao Ching comprising chapters 1–37 and the Te Ching comprising next 44 chapters (38–81). Other chapters of Tao Te Ching, as well as other Taoist scriptures such as Ultra Supreme Elder Lord's Ultra Plainness Scripture, and The Wonderful Scripture on the Constant Purity and Tranquility Spoken by the Ultra Supreme Elder Lord, etc., reiterate that Tao is formless, invisible, omnipresent, and is the source of all.It is written in Ultra Supreme Elder Lord's Ultra Plainness Scripture: "The Way (Tao) is immense and formless, also hidden and nameless. Beyond Heaven and Earth, it is profound and unseen. Inside Heaven and Earth, it is ample and vigorous. The Way is everywhere between Heaven and Earth."It is written in The Wonderful Scripture on the Constant Purity and Tranquility, Spoken by the Ultra Supreme Elder Lord:Chapter 34 of Tao Teh Ching says:Another translation of Chapter 34 of Tâo Teh King: "All-pervading is the Great Tao! It may be found on the left hand and on the right. All things depend on it for their production, which it gives to them, not one refusing obedience to it. When its work is accomplished, it does not claim the name of having done it. It clothes all things as with a garment, and makes no assumption of being their lord."

Based on these descriptions, Tao is considered to be the Absolute Truth independent of any conditions, and the Ultimate Reality behind all phenomena. It is the underlying natural order of the universe whose ultimate essence is difficult to circumscribe because it is non-conceptual yet evident in one's being of aliveness.

Personification of Tao In Tao Te Ching, Tao is often described as a feminine concept or figure. For example, in some chapters, Tao is described as the Mother of the universe who gives birth to all existence and sustains them,Tao Teh Ching Translations Chapter 25, 52, 51A Comparison of the Femininity of Lady Wisdom of Proverbs in the Old Testament and Dao of Daodejing by Soon-Young Kim while in some other chapters, the practice of adhering to Tao is called "keeping to the Mother", "keeping to the Feminine" or "being fed by the Mother".Tao Teh Ching Translations Chapter 52, 28, 20Chapter 52 of Tao Teh Ching :There was a beginning of the universeWhich may be called the Mother of the Universe.He who has found the mother (Tao)And thereby understands her sons (things)And having understood her sons,Still keeps to its mother,Will be free from danger throughout his lifetime.Another translation of Chapter 52 :There was a beginning of the universeWhich may be regarded as the Mother of the Universe.From the Mother, we may know her sons.After knowing the sons, keep to the Mother.Thus one's whole life may be preserved from harm.Chapter 28 of Tao Teh Ching :Know the masculine.Keep to the feminine.And be the Brook of the WorldTo be the Brook of the World isTo move constantly in the path of VirtueWithout swerving from itAnd to return again to infancy.Another translation of Chapter 28 :He who knows the maleand keeps to the femaleBecomes the ravine of the world.Being the ravine of the world.He will never depart from eternal virtue.But returns to the state of infancy.Chapter 20 of Tao Teh Ching :I alone am different from othersAnd value being fed by the Mother.

Additionally, some ancient Chinese classics describe a supreme goddess considered an embodiment of Tao, known as Holy Mother the Original Lord (聖母元君), Ultimate One Original Lord (太一元君), Uncreated Original Empress (先天元后), Supreme Original Lord (無上元君), etc.City Yung's Collective Record of Immortals (墉城集仙錄) : Holy Mother the Original Lord is an embodiment of the mysterious and harmonious energy of the Feminine Principle. She is the teacher of the Heavenly Emperor.Master Loy's Spring and Autumn Annals (呂氏春秋.大樂) : Tao is the ultimate essence, which is formless and nameless. To name it artificially, it can be called Ultimate One. (道也者,至精也,不可為形,不可為名,強為之,謂之太一。)The Ultimate One generates Water (太一生水) : Heaven and Earth are created by Ultimate One. According to the ancient classics, She is the teacher of Yellow Emperor, Lao Tzu and Ninth Heaven Mysterious Goddess (九天玄女).Heavenly Classic of the Seven Essences (雲笈七籤) : Ninth Heaven Mysterious Goddess is a disciple of Yellow Emperor's mentor known as Holy Mother the Original Lord.Master who Embraces the Plainness (抱朴子) : Yellow Emperor and Lao Tzu received the essential teachings through learning from Ultimate One Original Lord.Record of Immortals throughout the Ages (歷世真仙體道通鑑後集) : Lao Tzu traveled afar and arrived at Mountain Loe, where he met Ultimate One Original Lord. He learnt from her the secret teachings of Golden Elixir.

According to Taoist Scriptures, Ultra Supreme Elder Lord (太上老君) is also an embodiment of Tao, and the historical Lao Tzu is considered an incarnation of him.The Eighty-one Incarnations of the Elder Lord (老子八十一化) : The Elder Lord is the root of the Original Light, the true essence of creation. He is an embodiment of the Self-existent principle, which is Tao.According to The Eighty-one Incarnations of the Elder Lord (老子八十一化), many important divine immortals in Taoist mythology are incarnations of the Elder Lord.Heavenly Classic of the Seven Essences (雲笈七籤) : Lao Tzu is actually the Elder Lord, who is the embodiment of Tao, the source of the Original Energy, and the root of Heaven and Earth.

Description and uses of the concept The word "Tao" has a variety of meanings in both the ancient and modern Chinese language. Aside from its purely prosaic use meaning road, channel, path, principle, or similar, the word has acquired a variety of differing and often confusing metaphorical, philosophical, and religious uses. In most belief systems, the word is used symbolically in its sense of "way" as the right or proper way of existence, or in the context of ongoing practices of attainment or of the full coming into being, or the state of enlightenment or spiritual perfection that is the outcome of such practices.

Some scholars make sharp distinctions between the moral or ethical usage of the word "Tao" that is prominent in Confucianism and religious Taoism and the more metaphysical usage of the term used in philosophical Taoism and most forms of Mahayana Buddhism; others maintain that these are not separate usages or meanings, seeing them as mutually inclusive and compatible approaches to defining the principle.

Conventionally used to refer to something that cannot otherwise be discussed in words, the term was originally used as a form of praxis rather than theory. Early writings such as the Tao Te Ching and I Ching are careful to distinguish between conceptions of the Tao (sometimes referred to as "named Tao") and the Tao itself (the "unnamed Tao"), which cannot be expressed or understood in language. Liu Da asserts that the Tao is properly understood as an experiential and evolving concept and that there are not only cultural and religious differences in the interpretation of the Tao but personal differences that reflect the character of individual practitioners.

The Tao can be roughly thought of as the "flow of the universe", or as some essence or pattern behind the natural world that keeps the Universe balanced and ordered. It is related to qi, the essential energy of action and existence. The Tao is a non-dualistic principle—it is the greater whole from which all the individual elements of the Universe derive. Catherine Keller considers it similar to the negative theology of Western scholars, but the Tao is rarely an object of direct worship, being treated more like the Hindu concepts of karma, dharma, or Ṛta than as a divine object. The Tao is more commonly expressed in the relationship between wu (void or emptiness, in the sense of wuji) and the natural, dynamic balance between opposites, leading to its central principle of wu wei (inaction or inexertion).

The Tao is usually described in terms of elements of nature, and in particular, as similar to water. Like water it is undifferentiated, endlessly self-replenishing, soft and quiet but immensely powerful, and impassively generous. The Song dynasty painter Chen Rong popularized the analogy with his painting Nine Dragons.

Much of Taoist philosophy centers on the cyclical continuity of the natural world and its contrast to the linear, goal-oriented actions of human beings, as well as the perception that the Tao is "the source of all being, in which life and death are the same."

In all its uses, the Tao is considered to have ineffable qualities that prevent it from being defined or expressed in words. It can, however, be known or experienced, and its principles (which can be discerned by observing nature) can be followed or practiced. Much of East Asian philosophical writing focuses on the value of adhering to the principles of the Tao and the various consequences of failing to do so.

The Tao was shared with Confucianism, Chan Buddhism and Zen, and more broadly throughout East Asian philosophy and religion in general. In Taoism, Chinese Buddhism, and Confucianism, the object of spiritual practice is to "become one with the Tao" (Tao Te Ching) or to harmonize one's will with nature to achieve 'effortless action'. This involves meditative and moral practices. Important in this respect is the Taoist concept of de ('virtue'). In Confucianism and religious forms of Taoism, these are often explicitly moral/ethical arguments about proper behavior, while Buddhism and more philosophical forms of Taoism usually refer to the natural and mercurial outcomes of action (comparable to karma). The Tao is intrinsically related to the concepts of yin and yang, where every action creates counter-actions as unavoidable movements within manifestations of the Tao, and proper practice variously involves accepting, conforming to, or working with these natural developments.

In Taoism and Confucianism, the Tao was sometimes traditionally seen as a "transcendent power that blesses" that can "express itself directly" through various ways, but most often shows itself through the speech, movement, or traditional ritual of a "prophet, priest, or king." Tao can serve as a life energy instead of qi in some Taoist belief systems.

De

De () is the term generally used to refer to proper adherence to the Tao. De is the active living or cultivation of the way. Particular things (things with names) that manifest from the Tao have their own inner nature that they follow in accordance with the Tao, and the following of this inner nature is De. Wu wei, or 'naturalness', is contingent on understanding and conforming to this inner nature, which is interpreted variously from a personal, individual nature to a more generalized notion of human nature within the greater Universe.