ISAVASYA UPANISHAD :
VAJASANEYI SAMHITA UPANISHAD
Mantram : 8.
Discussion-5. "The Self is the Seer" .....
It is a declaration that the Lfe-spark in us is the real vitality behind the eyes that see, the ears that hear, the nose that smells, the tongue that tastes, and the skin that feels.
In fact, if the Life-principle is removed from the sense-organs, they, in themselves are impotent to register any impressions of their objects.