A journey is a gesture inscribed in space, it vanishes even as it’s made. You go from one place to another place, and on to somewhere else again, and already behind you there is no trace that you were ever there. The roads you went down yesterday are full of different people now, none of them knows who you are. In the room you slept last night a stranger lies in the bed. Dust covers over your footprints, the marks of your fingers are wiped off the door, from the floor and table the bits and pieces of evidence are swept up and thrown away and they never come back again. The very air closes behind you like water and soon your presence, which felt so weighty and permanent, has completely gone. Things happen only once and are never repeated, never return. Except in memory.
Damon Galgut "In a Strange Room"
...unfortunately, it's true: time does heal. It will do so whether you like it or not, and there's nothing anyone can do about it. If you're not careful, time will take away everything that ever hurt you, everything you have ever lost, and replace it with knowledge. Time is a machine: it will convert your pain into experience. Raw data will be compiled, will be translated into a more comprehensible language. The individual events of your life will be transmuted into another substance called memory and in the mechanism something will be lost and you will never be able to reverse it, you will never again have the original moment back in its uncategorized, preprocessed state. It will force you to move on and you will not have a choice in the matter.
Charles Yu "How to Live Safely in a Science Fictional Universe"