The Upanishads were written by?

The different philosophical speculations in the early Upanishads have been ascribed to celebrated sages, for example, Yajnavalkya, Uddalaka Aruni, Shvetaketu, Shandilya, Aitareya, Balaki, Pippalada, and Sanatkumara.

Explanation:

the formation of Vedas is credited to Brahma. The Vedic psalms themselves affirm that they were skillfully made by Rishis (sages), after motivated innovativeness, similarly as a woodworker fabricates a chariot. There are four Vedas: the Rigveda, the Yajurveda, the Samaveda and the Atharvaveda. Subsequently it is best to get Bhagavad-Gita first. Read Katha Upanishad first. It grows efficiently the darsana basic Hinduism. Taiteerya Upanishat is instructed first.

The Upanishads are a collection of religious and philosophical texts, written in India probably between 800 BCE and 500 BCE. The name derives from Upa (near) and shad (to sit), meaning to "sit close by." The name refers to the action of sitting at the feet of an illuminated teacher to engage in a session of instruction.

The vast majority of the Upanishads are anonymous, but some are the exception to this rule. Among those authors that are mentioned, we can find sages such as Yajnavalkya, Uddalaka Aruni, Shvetaketu, Shandilya, Aitareya, Balaki, Pippalada, and Sanatkumara.