Changes

The number of works that go by the name Upanishad and available today in print exceeds 200. The मुक्तिकोपनिषद् ॥ Muktikopanishad gives a list of 108 Upanishads. However, the principal Upanishads are accepted to be those which श्रीआदिशङ्कराचार्यः ॥ Sri Adi Shankaracharya chose to comment upon.

The number of works that go by the name Upanishad and available today in print exceeds 200. The मुक्तिकोपनिषद् ॥ Muktikopanishad gives a list of 108 Upanishads. However, the principal Upanishads are accepted to be those which श्रीआदिशङ्कराचार्यः ॥ Sri Adi Shankaracharya chose to comment upon.

श्रीशङ्कराचार्यः ॥ Sri Shankaracharya was the earliest commentator on the Upanishads. He chose only 10 Upanishads for his commentaries<ref name=":222" />. According to some scholars, he commented upon 11 Upanishads. He refers to 4 more Upanishads in his commentary on ब्रह्मसूत्रम् ॥ Brahmasutra namely श्वेताश्वतर-उपनिषद् ॥ Shvetashvatara  Upanishad, कौषीतकी उपनिषद् ॥ Kousitaki Upanishad, जाबाल-उपनिषद् ॥ Jabala Upanishad, महानारायण-उपनिषद् ॥ Mahanarayana Upanishad, and पैङ्गल-उपनिषद् ॥ Paingala Upanishad.

श्रीशङ्कराचार्यः ॥ Sri Shankaracharya was the earliest commentator on the Upanishads. He chose only 10 Upanishads for his commentaries<ref name=":222" />. According to some scholars, he commented upon 11 Upanishads. He refers to 4 more Upanishads in his commentary on ब्रह्मसूत्रम् ॥ Brahmasutra namely श्वेताश्वतर-उपनिषद् ॥ Shvetashvatara  Upanishad, कौषीतकी उपनिषद् ॥ Kausitaki Upanishad, जाबाल-उपनिषद् ॥ Jabala Upanishad, महानारायण-उपनिषद् ॥ Mahanarayana Upanishad, and पैङ्गल-उपनिषद् ॥ Paingala Upanishad.

Considering the ones chosen by him for commenting as reference material and as the most ancient and authentic, they are termed as major or principal Upanishads. We may list them as follows:

Considering the ones chosen by him for commenting as reference material and as the most ancient and authentic, they are termed as major or principal Upanishads. We may list them as follows:

The Upanishads are the concluding portions of the Vedas which discuss philosophical issues both in prose and metrical forms. They are commonly referred to as वेदान्तः || Vedanta, variously interpreted to mean either the "last chapters, parts of the Vedas" or "the object, the highest purpose of the Veda". The concepts of ब्रह्मन् || Brahman (Ultimate Reality, परमात्मा ॥ Paramatma), आत्मन् || Atman (Soul, Self, जीवात्मा ॥ Jivatma) and liberation of soul (मुक्तिः ॥ Mukti/ मोक्षः ॥ Moksha) are central ideas in all the Upanishads and primarily focus on routes for obtaining ब्रह्मविद्या ॥ [[Brahmavidya (ब्रह्मविद्या)|Brahmavidya]] which on practice leads one to मुक्तिः ॥ Mukti. The Upanishads are the foundation of Hindu philosophical thought and its diverse traditions.<ref name=":222" />

The Upanishads are the concluding portions of the Vedas which discuss philosophical issues both in prose and metrical forms. They are commonly referred to as वेदान्तः || Vedanta, variously interpreted to mean either the "last chapters, parts of the Vedas" or "the object, the highest purpose of the Veda". The concepts of ब्रह्मन् || Brahman (Ultimate Reality, परमात्मा ॥ Paramatma), आत्मन् || Atman (Soul, Self, जीवात्मा ॥ Jivatma) and liberation of soul (मुक्तिः ॥ Mukti/ मोक्षः ॥ Moksha) are central ideas in all the Upanishads and primarily focus on routes for obtaining ब्रह्मविद्या ॥ [[Brahmavidya (ब्रह्मविद्या)|Brahmavidya]] which on practice leads one to मुक्तिः ॥ Mukti. The Upanishads are the foundation of Hindu philosophical thought and its diverse traditions.<ref name=":222" />

They are the essence of the Vedas containing their knowledge aspects along with explanation of कर्म-s || karmas (as in Upakosala's tending to fires in छान्दोग्य-उपनिषद् ॥ Chandogya Upanishad). The philosophy of the Upanishads occupies the highest pedestal in the spiritual knowledge. They speak about the identity of the Supreme Eternal Soul, the ब्रह्मन् ॥ Brahman, the individual soul, the आत्मन् ॥ Atman, their mutual relationship, the Universe (जगत् ॥ jagat) and man’s place in it. In short, they deal with जीवात्मा || Jivatma, परमात्मा || Paramatma, जगत् || Jagat, अविद्या ॥ Avidya, कर्मफलम् ॥ Karmaphalam, पुनर्जन्म ॥ Punarjanma and जगदीश्वरः || Jagadishvara.

They are the essence of the Vedas containing their knowledge aspects along with explanation of कर्म-s || karmas (as in Upakosala's tending to fires in छान्दोग्य-उपनिषद् ॥ Chandogya Upanishad). The philosophy of the Upanishads occupies the highest pedestal in the spiritual knowledge. They speak about the identity of the Supreme Eternal Soul, the ब्रह्मन् ॥ [[Brahman (ब्रह्मन्)|Brahman]], the individual soul, the आत्मन् ॥ [[Atman (आत्मन्)|Atman]], their mutual relationship, the Universe (जगत् ॥ jagat) and man’s place in it. In short, they deal with जीवात्मा || Jivatma, परमात्मा || Paramatma, जगत् || Jagat, अविद्या ॥ Avidya, कर्मफलम् ॥ Karmaphalam, पुनर्जन्म ॥ Punarjanma and जगदीश्वरः || Jagadishvara.

आरण्यक-s || Aranyakas are sometimes identified as कर्मकाण्ड ॥ karma-kanda (ritualistic section), while the Upanishads are identified as ज्ञानकाण्ड ॥ jnana-kanda (spirituality section). In an alternate classification, the early part of Vedas are called संहिताः ॥ Samhitas and the commentary are called the ब्राह्मण-s || Brahmanas which together are identified as the ceremonial कर्मकाण्डः ॥ karma-kanda, while आरण्यक-s || Aranyakas and उपनिषद्-s || Upanishads are together referred to as the ज्ञानकाण्डः ॥ jnana-kanda.

आरण्यक-s || Aranyakas are sometimes identified as कर्मकाण्ड ॥ karma-kanda (ritualistic section), while the Upanishads are identified as ज्ञानकाण्ड ॥ jnana-kanda (spirituality section). In an alternate classification, the early part of Vedas are called संहिताः ॥ Samhitas and the commentary are called the ब्राह्मण-s || Brahmanas which together are identified as the ceremonial कर्मकाण्डः ॥ karma-kanda, while आरण्यक-s || Aranyakas and उपनिषद्-s || Upanishads are together referred to as the ज्ञानकाण्डः ॥ jnana-kanda.