成唯識論述記 1.447

1.447

述曰：第二，比量。又此三中各有三相，共成大等。如何知三事各有異也？三事比量各有一種，且為一量云：汝薩埵、剌闍二法，應非薩埵、剌闍；具三相故；如答摩。或應此二即是答摩；有三相故；如答摩。既爾，如何知三事別？

The Commentary states: Second, an inference: Furthermore, each of these three possesses three marks, and together they form mahat and so forth. How can one know that the three things are distinct from one another? There is a syllogism for each of the three things. For now, we state one syllogism: Your two factors, sattva and rajas, should not be sattva and rajas; because they possess the three marks; like tamas. Alternatively: These two should just be tamas; because they have the three marks; like tamas. If so, how can one know the distinction among the three things?