What is a detailed analysis of Elizabeth Jennings' poem "Reminiscence" in terms of summary, language, tone, imagery, and themes?

As the
title indicates, in this poem, Jennings remembers her childhood. She contrasts her childhood
state of mind with her adult state. As a child she lived without analyzing her world too deeply
and that was a happier state for her. Then she did not "fret at thought" (in other
words, worry) or try to figure everything out: she simply lived and did not try to "whittle
a pattern" (make sense of everything). Adult thinking causes her anxiety, making her
sometimes "numb with fear." She looks...