首楞嚴義疏注經 1.661

1.661

此結阿難答身境。手有開合，頭自動搖，身境、客塵同一生滅，更無二別。應知客必有主，塵處有空。對佛手之見，形頭動之性，未甞動靜，豈成去來？前後會通，其揆一也。

This concludes Ānanda's replies regarding the body and objects. The hand has opening and closing, and the head shakes and moves on its own; the body and its objects, the guest and the dust, are identical in arising and ceasing, with no difference between them. One should know that a guest must have a host, and where dust is, there is space. Contrasting the seeing of the Buddha's hand and comparing it with the nature [watching] the moving head, it has never moved or been still; how could it come or go? Synthesizing before and after, their principle is one and the same.