In the Vedic and Hindu religions, Brahman has a "variety of meanings", but in the Upanishads and later Indian philosophies it connotes 'That' from which all existence proceeds, and to which everything
A drop in the ocean: an analogy for Ātman merging into Brahman.
Deities Vishnu, Lakshmi, Shiva, Parvati and Ganesha. These deities have distinct and complex personalities, yet are often viewed as aspects of and are worshipped as incarnations of the same ultimate reality called Brahman.
Swan (Hansa, हंस) is the symbol for Brahman-Atman in Hindu iconography.
The Maitrayaniya Upanishad is an ancient Sanskrit text that is embedded inside the Yajurveda. It is also known as the Maitri Upanishad, and is listed as number 24 in the Muktika canon of 108 Upanishad
A page of the Maitrayaniya Upanishad manuscript found in Pune, Maharashtra (Sanskrit, Devanagari)