Deep inside the recesses of your mind your memories are stored, all the ones you can recall plus many more that you can’t.
Your unconscious mind will allow you to recall your memories as it sees fit, as your protector it may withhold access on any that may cause you any distress. People who have suffered a trauma, such as a violent attack or disaster, may have what is referred to as dissociative amnesia where a memory is suppressed. This can be temporary, the memory coming back in small stages, giving you time to overcome the event in parts. For some the amnesia will be permanent, the mind will keep the memory blocked to ensure that no further distress will come of it.
It is easy to see why the mind will protect you from the memory of such traumas but what about more innocent memories, tomorrow we’ll investigate.