瑜伽論記 5.351

5.351

基云：經說色相為尋思故，難說示他故，不可見者，所證色自相性離言說，以尋伺境不稱自相名為尋思難為示他。

Ji says: "The sūtra speaks of form-characteristics being discursive thought; because they are difficult to explain and display to others, they are invisible. The self-characteristic nature of the form verified is apart from verbal expression; because the object of investigation and reflection does not correspond to the self-characteristic, it is called discursive thought, which is difficult to display to others."