The eyes do not look outward, but light up what is within. There is light in this place. 



The mouth does not speak nor laugh. One closes the lips and breathes inwardly. Breathing is at this place.



The nose smells no odours. Smelling is at this place.



The ear does not hear things outside. Hearing is at this place.



The whole heart watches over what is within. Its watching is at this place.



The thoughts do not stray outward; true thoughts have continuity in themselves.



When one looks at what is within in this way, the wonders of the opening and shutting of the gates of Heaven will be inexhaustible.