首楞嚴義疏注經 1.322

1.322

汝或執言，雖見我面，定是我體。即復破云：佛亦見汝，應是汝身。應立量云：如來之身定是汝體，見汝面故，如汝心眼。設或不許佛身是汝，汝之心眼亦非是汝，便同前文，自非汝體也。

You might hold: 'Although it sees my face, it is definitely my substance.' Then [the Buddha] refutes it again, saying: 'The Buddha also sees you, so he should be your body.' One should establish the syllogism: 'The Tathāgata's body is definitely your substance; because he sees your face; like your mind and eyes.' If one does not grant that the Buddha's body is you, then your mind and eyes are also not you; this is just as stated earlier: 'it is naturally not your substance.'