Kena Upanishad

The Kena Upanishad is one of the principal Upanishads. It is a short upanishad consisting of four khaṇḍas (sections) on the unknowability and ineffability of Brahman.

Quotes

Olivelle, Patrick (1998). The Early Upanishads. Oxford: Oxford University Press. ISBN 0-19-512435-9. 

• It is far different from what's known.

And it is farther than the unknown—

so have we heard from men of old,

who have explained it all to us.

• 1.4

• Which one cannot grasp with one's mind,

by which, they say, the mind itself is grasped—

Learn that that alone is brahman,

and not what they here venerate.

• 1.6