I would that those who wish might go
back to their childhood innocence
but I am wise enough to know.
That looking back makes little sense.
The memories you cherish now
are merely vignettes which express
the happy times: Hiding below
are recollections you suppress.
The things you don’t want to recall.
The times of abject misery.
If you went back you’d face them all
Each long forgotten memory.
Given the opportunity
I could refuse quite easily.

ivor or ivor.e hogg

http://www.poemhunter.com/poem/rose-tinted-recollections/