Thus there are reasons why all dharmas are nonexistent and therefore cannot be considered to be existent, and there are reasons why they are not nonexistent and therefore cannot be considered to be nonexistent. Why? Suppose we say that they are existent. Such existence is not true (or absolute). Or suppose we say that they are nonexistent. But phenomena have already taken shape. In as far as things have already taken shape, they cannot be said to be nonexistent, and since they have no true existence, they cannot be said to be really existent. From this, the principle of the emptiness of the unreal should become clear.

(Seng-Chao)