瑜伽論記 16.73

16.73

Answer: Because the lower three formless stages have the other two taintless faculties, they are said to have that [faculty of] that which has not yet been known and will be known. Neither-perception lacks the latter two taintless faculties; even if this practice were present, the treatises' authors would not mention it. Furthermore, because the mind of neither-perception is dark and obtuse, it is not like the lower stages that can give rise to this practice; therefore, it is not said to possess the first taintless faculty.