首楞嚴義疏注經 3.211

3.211

破空是知。初三句根無知覺破，如是下二句空即是身破，汝身下三句結無本體。

This refutes empty space being the cognition. The first three sentences refute it on the ground that the sense faculty lacks perception. The two sentences from 'In this case' onward refute it on the ground that space would be the body. The three sentences from 'your body' onward conclude with the absence of an essential substance.