Looking at the above I can see that I initially intellectually understood what Richard’s quote was pointing to. Then I first thought that my resentment was unique, but even as I typed out the post it became clear I was describing the same thing 
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But then the main ingredient was still missing - which is acknowledging the fact that I will never physically be a child again. Those hurts along with my reactionary responses are echoes from the past, they have no relevance in my life now other than the one I habitually give them.