How I Save the Past?

I’m thinking about memory right now.  Different types of memory … maybe I rank the types from most vivid to least.  (I’m trying to depict in my memoir why there are some memories of Jack, I don’t want to recall, because I don’t want to lose them.)

1. A flashback.  Whatever the trigger, a smell, reading an email from 2006 for the first time, a photograph ... I’m transported straight back into the scene.  Almost like a waking dream, or perhaps, psychologically, a delusion.   Feels real.  I have the same emotions in the present that I had in the past.  No discontinuity.  They start where they left off.  Or maybe even new emotions now … that I was unwilling or unable to let myself experience in the past.  As if they were locked up waiting for a trigger to unlock them.
2. I’m walking down street on my way to coffee on Phinney Ridge and see a fence with slats.  I recall my dog Prince from my childhood.  I come home from school and find Prince smiling at me--his head stuck between horizontal slats in the fence.  He's dying of thirst, he tongue droops from his mouth, and he's happy to see me.  That memory is emotional, but I know I’m experiencing a memory.  I’m here, 53, in Seattle, revisiting a pleasant scene from my childhood.  I almost feel that hot, Gulf Coast sun on my face.  And the humidity.  Almost, but not really.  (It is also a social memory.  A boy and his dog.)
3. Type 3 is a kind of rehearsed memory.  It is familiar.  I return to it often and it has lost some of its emotional significance.  Diluted.  Maybe from my childhood, again, sitting on pink, ratty sprung couch watching Hogan’s Heroes with my dad in the den.  There were years of evenings like that … so my memory may not be a specific evening but a blend of many.  It feels indicative--a second or third layer removed from the actual event.
4. Unemotional memories … like my phone number.  Or maybe directions to the house I grew up in.  I could describe to you precisely how to get from the airport to my house in Nassau Bay.  But if I’m down there in Houston, and actually in a rental care driving the route, the memories become more vivid /emotional … a song comes on the radio from my high school days.  Then it is like memory 2 above. 

Memories types 1 & 2 surprise me, catch me off guard.  (Much coaching on vivid writing is about making the words surprise The Reader, and giving the words emotional weight.  I don't want to resort to tricks or gimmicks to surprise, but when I can find a way in the memoir to surprise, w/o the gimmick, then the memoir is better.)

So how do I save the past?  How do I preserve the freshness/immediacy of memories of Jack?  If each time I replay a memory, it loses significance.  I guess that’s a gift or skill actors have.  If they have to cry in a scene, there’s a memory they can draw on, and they can put themselves back in that emotional state.  Maybe they have the ability to infinitely re-imagine, recreate the scene … vs. remembering it.  How do I develop that ability?

Memory 1, the flashback, ironically I guess, is a symptom of PTSD, and those flashbacks are really really hard to get rid of.  Often they are violent.  So that durability makes me hopeful that I won't lose the flashback no matter how frequently it is triggered. I yearn for any flashback to Jack.  Even a traumatic one.

I worry, though, about fading and changing the memory and losing the connection to the past.  I believe that science posits that each time you recall a memory, you corrupt it a little with something from the present when it is returned to the memory banks.  (The present can be from your narrative self--other parts of the story you are telling yourself now about your past.)

But I might be conflating two things.  The trigger and the memory.  The object, for example the photograph that triggers the memory.  Maybe the photograph loses its impact as a trigger if you keep going back to it.  Maybe the memory is still there but you have to stumble upon a different, fresher object (memento, totem, talisman … ) to trigger it.

A rhetorical question.

And another, what past do I save?