成唯識論演祕 1.808

1.808

若不言緣，為言離識實有自體即是現量，論若許爾者，即自他宗皆說心等非離識故，故違宗過。

If one does not say "cognizing", but says that an actual entity separate from consciousness is itself direct perception, and if the treatise were to accept this, then since both one's own and the opponent's schools state that mind and the like are not separate from consciousness, there would be the fault of contradicting one's own thesis.