What the living agent sces with eyes acting in unison with the mind, the eye sees not, even when lying before it, if the mind elsewhere engaged.
सर्वं पश्यति यद् दृश्यं मनोयुक्तेन चक्षुषा। मनसि व्याकुले चक्षुः पश्यन्नपि न पश्यति॥