瑜伽論記 5.350

5.350

初頌顯示乃至不可見者，景云：此約末那所緣我境名自內證，此末那執我行相難知名為無色不可見。

Regarding "the first verse reveals up to 'invisible'": Jing says: "This refers to the object of the self grasped by manas, termed 'internally verified by oneself'; the mode of activity of this manas in grasping a self is difficult to know, and is thus called 'formless and invisible.'"