If you are standing on the bank of a river, the river appears to flow by, while if you are floating down the river the bank slides past, It is not like this with time since there is no place of perceiving that is not equally in time, so your impression of the flow of duration can only be imagined, from imagining and identifying with a place of permanence within time, this is not to be disputed, but only by acknowledging that the imagination itself is in time, or better, is time itself. The phenomenon is not divided into parts which 'move' at different rates.