Perhaps you can conjure the clattering iron radiator in your first apartment after college. But will you ever care about last week’s meme that pinged from one social network to another? The flow of daily irrelevance flooding your phone washes away real, unretrievable hours like an unstoppable stream filling an infinitely wide basin. Memories of the sounds from your first apartment may not be the most important thing in your life, but they are impressions collected from your actual life. That radiator literally radiated heat into the place you lived.