The main idea of the Upanishads is to explore the nature of reality, the self, and the ultimate source of existence (Brahman). They emphasize the interconnectedness of all things and aim to guide individuals towards self-realization and spiritual enlightenment through deep contemplation and meditation.
There are 18 Puranas & 11 main Upanishads , but there are more smaller Upanishads which are 108 in number . Some also say that they are more Than 200 . :/
Mandukya then Ishavasya among Major (10) Upanishads although there are several other small Upanishads if you consider 108 of them.
The Principal Upanishads - book - was created in 1953.
Upanishads is one of the many sacred texts of Hinduism.
it is impotent as it is partly the Vedas so if there wasn't Upanishads the Vedas wouldn't be complete.
One highly recommended translation of the Upanishads is by Eknath Easwaran.
The Upanishads are secret texts of the Hindu region. Some say they are more of a philosophy than a religion. The twelve texts of the Upanishads give instructions for moral questions.
According to Muktika Upanishad,total number of Upanishads count upto 108.
The ISBN of The Principal Upanishads - book - is 81-7223-124-5.
The translation of the Upanishads by Eknath Easwaran is often considered one of the best.
The Principal Upanishads - book - has 958 pages.
The difference is that the stated main idea is there in the text but the implied main idea is what you think the author was trying to convey.