Catkins, I think what we learn and experience when we were young sticks with us until we change it ourselves. Especially stuff that we perceive as protecting us from danger for our survival.
When we are older we can make our own judgements but somehow what mum or dad taught us tends to stick around as if it was the holy grail of life. A bit like "don't take sweets from strangers". Except there may have been things said or seen that was not quite the truth but because we were young and learning we accept it because mum or dad said so.
This one especially springs to mind....
"if you don't eat your greens you won't grow up to big and strong". And I wouldn't eat porridge because my mum said it puts hairs on your chest. "Don't look at the moon because it will make you mad" (too late for that one, lol).
Just watching my dad go through a security regime of locking up and checking before going to bed must have had some affect on me constantly checking doors, windows shut and car are locked before I go to bed.
My mum with over analysing her physical feelings.
I find myself sometimes thinking, "Oh god, my mum used to do that".
Words are so powerful and even more so when we are growing up and learning. And although most things that are said by our parents are helpful in latter life, some things are not and it's up to us to decide what bits to take from our learning. We are also an individual not our mum or dad.
As for bad experiences of the past, they can certainly stick with us well into our future and I suppose it's meant to so as to remind us as a warning and how to react if it should happen again. What we need to reassure ourselves of is it was past and it cannot be changed but we can now look at any situation as an adult and comfort that childhood memory. We might even shelve some not so nice experiences because the time was not right to process them or we didn't know how to or we had to be brave at the time. It doesn't mean we failed or made the wrong decision, it just happened. The main thing is we survived and are living and it's up to us fill our lives with comfort and peace and a healthy balance.