摩訶止觀 1.136

1.136

還翻此心而生於解。譬如畫師洗蕩諸色、塗以墡彩。所謂觀身不淨，乃至觀心無常，如是道品紆通化城。觀身身空，乃至觀心心空。空中無無常，乃至無不淨。如是道品直通化城。觀身無常，無常即空，乃至觀身法性非常非無常、非空非不空，乃至觀心亦如是。如是道品紆通寶所。觀身法性非淨非不淨，雙照淨不淨；乃至觀心法性常無常、雙照常無常。如是道品直通寶所。

Turning this mind around, one generates understanding. This is like a painter washing away all the colors and applying white pigment. That is to say, contemplating the body as impure, up to contemplating the mind as impermanent—such path factors circuitously lead to the conjured city. Contemplating the body as empty of body, up to contemplating the mind as empty of mind—within emptiness there is no impermanence, up to no impurity—such path factors directly lead to the conjured city. Contemplating the body as impermanent, impermanence being itself empty, up to contemplating the dharmatā of the body as neither permanent nor impermanent, neither empty nor non-empty, and contemplating the mind likewise—such path factors circuitously lead to the place of jewels. Contemplating the dharmatā of the body as neither pure nor impure, illuminating both pure and impure; up to contemplating the dharmatā of the mind as both permanent and impermanent, illuminating both permanent and impermanent—such path factors directly lead to the place of jewels.