a measure determines”; hence it implies a certain determination according to a certain measure. Therefore, just as that in accordance with which the potency of matter is determined to its substantial being, is called quality, which is a difference affecting substance, so that in accordance with which the potency of the subject is determined to its accidental being is called an accidental quality, which is also a kind of difference, as is clear from the Philosopher.1 Now the mode or determination
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