A simple translation of the Upanishad containing the original text in Devanagari, transliteration of each shloka, and word-for-word English rendering followed by a running translation and notes based on Shankaracharya's commentary.
What is material and what is not material? When the world is the end and God the means to attain that end, then that is material. When God is the end and the world is only the means to attain that end, spirituality has begun.
-Swami Vivekananda