“The word “upanishad” literally means “sitting near, devotedly,” which suggests that by sitting near, one receives secret instruction from a teacher and thus divine knowledge is communicated. The Upanishads were written in Sanskrit, and were unavailable to those not knowing that language until approximately 1650 A.D., when they were translated into Persian. They did not reach Western Europe until 1801, when the Persian translation was further translated into Latin.

The influence of the Upanishads was soon apparent. The most notable person to be influenced by the work was Schopenhauer, whose whole philosophy is a kind of Westernized, one-sided elaboration of the Upanishads. Another such person was Ralph Waldo Emerson. Nietzsche was much affected by them, and so was Jung, both directly and through Schopenhauer and Nietzsche. He took the term “Self” from the Upanishads. Jung quoted from them in paragraphs 348 and 349. A slightly expanded form of these same quotations makes them more vivid and gives them more impact:

“At whose behest does the mind think? Who bids the body live? Who makes the tongue speak? Who is that effulgent Being that directs the eye to form and color and the ear to sound?

The Self is ear of the ear, mind of the mind, speech of the speech. He is also breath of the breath, and eye of the eye…Him the eye does not see, nor the tongue express, nor the mind grasp. Him we neither know nor are able to teach. Different is he from the known, and different is he from the unknown…That which is not comprehended by the mind but by which the mind comprehends - know that to be Brahman….

That which is not seen by the eye but by which the eye sees - know that to be Brahman….That which is not heard by the ear, but by which the ear hears - know that to be Brahman.

He who dwells in all beings but is separate from all beings, whom no being knows, whose body all beings are, and who controls all beings from within - he, the Self, is the Inner Ruler, the Immortal.”

These words were written no later than 500 B.C. They show how the East, notably India, is far beyond the West in psychological sophistication.”

(http://www.autoadmit.com/thread.php?thread_id=5769882&forum_id=2"#49236928)