Shabda
Shabda (, ), is the Sanskrit word for "speech sound". In Sanskrit grammar, the term refers to an utterance in the sense of linguistic performance. History. In classical Indian philosophy of language, the grammarian Katyayana stated that "shabda" ("speech") is eternal ("nitya"), as is "artha" "meaning", and that they share a mutual co-relation. According to Patanjali, the permanent aspect of "shabda" is ("meaning"), while "dhvani" ("sound, acoustics") is ephemeral to "shabda". Om, or Aum, a sacred syllable of Hinduism, Buddhism, Jainism and Sikhism, is considered to be the first resonating vibrational sound within an individual being. It also denotes the  non-dualistic universe as a whole. In Buddhism, Om corresponds to the crown chakra and white light. Bhartrihari, on the other hand, held a "shabda-advaita" position, identifying "shabda" as indivisible, and unifying the notions of cognition and linguistic performance, which is ultimately identical to Brahman. Bhartrhari recognised two entities, both of which may be referred to as "shabda". One entity is the underlying cause of the articulated sounds, while the other entity is the functionality that is used to express meaning. Bhartrhari thus rejected the difference posited between the ontological and the linguistic by logicians. His concept of "shabda -brahman" which identified linguistic performance and creation itself ran parallel to the Greek concept of "logos". Language philosophy in Medieval India was dominated by the dispute of the "naturalists" to the Mimamsa school, notably defended by Kumarila, who held that "shabda" designates the actual phonetic utterance, and the Sphota school, defended by Mandana Mishra, which identifies "sphota" and "shabda" as a mystical "indivisible word-whole". In religion. Hinduism. "Śabda" (शब्द) means relying on word, testimony of past or present reliable experts, specifically the "shruti", Vedas. Hiriyanna explains "Sabda-pramana" as a concept which means reliable expert testimony. The schools of  Hinduism which consider it epistemically valid suggest that a human being needs to know numerous facts, and with the limited time and energy available, he can learn only a fraction of those facts and truths directly. He must rely on others, his parent, family, friends, teachers, ancestors and kindred members of society to rapidly acquire and share knowledge and thereby enrich each other's lives. This means of gaining proper knowledge is either spoken or written, but through "Sabda" (words). The reliability of the source is important, and legitimate knowledge can only come from the "Sabda" of reliable sources. The  disagreement between the schools of Hinduism has been on how to establish reliability. Some schools, such as Carvaka, state that this is never possible, and therefore "Sabda" is not a proper pramana. Other schools debate means to establish reliability. Sikhism. In Sikhism the term "Shabad" has two primary meanings. The first context of the term is to refer to a hymn or paragraph or sections of the Holy Text that appears in Guru Granth Sahib, the main holy scripture of the Sikhs. The Guru Granth Sahib is organised by chapters of "ragas", with each chapter containing many "shabads" of that  raga. The first "Shabad" in Guru Granth Sahib is the Mool Mantar. The script used for the "Shabad" is Gurmukhi. "Shabad" is the term also used to refer to hymns within other Sikh scriptures, like Deh Siva Var Mohe. Shabad Vani is devotional singing of hymns from Sikh scriptures. The second use of the term "Shabad" in Sikhism is for the holy name of God, Waheguru. Other faiths and philosophies. Esoterically, "Shabd" is the “Sound Current vibrating in all creation. It can be heard by the inner ears.” Variously referred to as the "Audible Life Stream", "Inner Sound", "Sound Current  or Word" in English, the "Shabd" is the esoteric essence of God which is available to all human beings, according to the Shabd path teachings of Sant Mat, Surat Shabd Yoga, Eckankar, Vardankar (a split-off from Eckankar), and Movement of Spiritual Inner Awareness. Adherents believe that a "satguru", Eck Master, or VARDAN Master, who is a human being, has merged with the "Shabd" in such a manner that he or she is a living manifestation of it at its highest level (the “Word made flesh”). However, not only can the "Satguru" attain this, but all human beings are inherently  privileged in this way. Indeed, in Sant Mat the "raison d’être" for the human form is to meditate on the Sound Current, and in so doing merge with it until one's own divinity is ultimately realized. "Naam" ("Name") has been described through the use of several different terms. Sant Baljit Singh, a contemporary Sant Mat Master, uses the term "Light and Sound Current". He describes it as the connecting link between human beings and God.