成唯識論演祕 3.536

3.536

答：影像之境，新新而起，前後不一，故緣名別，具如疏明。有義：非是所緣，前後易脫，但非如定，專注所緣，義說別言。

Answer: The imaged objects arise anew and anew, not being identical from earlier to later moments; therefore the conditioning is called different, as clarified in full in the Commentary. One opinion says: It is not that the intentional objects shift from earlier to later, but merely that it is not like meditative absorption which focuses exclusively on an intentional object, so it is figuratively called different.