Awakening in the morning when you first see the sun and the dew resting on the leaf which eye are you using. When you stare into the mirror through what eye do you see, and what eyes stare back at you.
When you see the deer lying in the road which eye do you use. In a nightmare, when you slip into the deeper, darker world, what eye is used then. When you fade into death what eye sees your departure. Think carefully on this for only one eye can see the answer lying within.
Standing outside the Temple there is much to see. Enter the Temple zendo prostrate three times before the golden Buddha what do you see? Can you see nothing? Outside the Temple, Buddha inside the Temple, Buddha but only when you see nothing. Outside the mind, nothing, inside the mind, nothing. All Buddha.