首楞嚴義疏注經 4.148

4.148

翳喻妄見，華喻山河。妄見若亡，山河自滅，故下文云「見聞如幻翳，三界若空華，聞復翳根除，塵消覺圓淨。」空無華處，故云空地。

The cataract illustrates deluded seeing; the flowers illustrate mountains and rivers. If deluded seeing perishes, mountains and rivers naturally vanish; hence the text below says: 'Seeing and hearing are like illusory cataracts; the three realms are like flowers in space. When hearing returns, the root of the cataract is removed; when dusts dissipate, awareness is completely pure.' The empty place where there are no flowers is called 'empty place'.