俱舍論記 1.192

1.192

「想蘊謂能至應如受說」者，別釋想蘊。像謂諸法自相、共相，此想能取，故名取像。如緣青時，想能封疆盡界，非非青故名之為青。黃等亦爾。此所取像，餘心所等不能取故。餘心所等雖緣一境，各別起用行解不同，約依不同別說成六，應如受說。

"The aggregate of conception means being able to... should be explained as with feeling": here the aggregate of conception is separately explained. 'Image' (nimitta) means the specific characteristics and common characteristics of all dharmas; this conception can grasp them, and is therefore called 'grasping images' (nimittodgrahaṇa). For instance, when cognizing blue, conception can delimit and demarcate its boundaries, defining it as blue because it is not non-blue. Yellow and the rest are also like this. These grasped images cannot be grasped by the other mental factors, etc. Although the other mental factors, etc., cognize the same object, they each generate distinct activities and different modes of apprehension. Differentiated according to different supports, they are explained as six, which should be understood as with feeling.