Gist of Taittriya Upanishad

He who realizes Brahman attains the supreme with reference to that very fact it has been declared:

"Brahman is Existence, Intelligence, Infinitude;

he who realizes him treasured in the cave,
in the highest ether,
fulfills all wants together,
as Brahman the omniscient.

Brahman being the ground and substratum of all,
he is immanent even in contradictories.
Whatever is perceived,
intuited, or imagined,
all that is He".

-Taittirioupanishad by Swami Sarvananda, Ramakrishna Math