十不二門指要鈔 2.22

2.22

二、二與下，約諭明修性體同者。雖明修性及智行等別，皆不二而二，故約波水橫竪諭之，仍約合中三法而說，開豈不然？初明修二如波、性一如水，二而不二波水可知。修性既然，修中二法，亦二而不二，同乎波水。

Second, from "Two and..." downward, explaining that the essence of cultivation and nature is identical by means of an analogy. Although the distinctions between cultivation and nature, as well as wisdom and practice, have been explained, they are all 'two yet nondual.' Therefore, they are illustrated horizontally and vertically through the analogy of waves and water, which is still spoken in terms of the three dharmas within the combined state; how could it not be so when opened? First, it explains that the two of cultivation are like waves and the one of nature is like water; being two yet nondual, waves and water can be understood. Cultivation and nature being so, the two dharmas within cultivation are likewise two yet nondual, identical to waves and water.