"Before the eyes, no potential. Mind is before the eyes" - Rakuho
Everything is intimately interconnected with everything else, and nothing exists independently. Yet the mind separates this out from that and confuses one thing as distinct from another. But since potential is not some thing before our eyes, it's beyond the reach of our perception.
In the Heart Sutra, it's said, "no eye, no ear, no nose, no tongue, no body, no mind," so what is it that's seeing and hearing? What is reciting the Heart Sutra? Which is the host, and which is the guest?