Part I
"A strange multiplicity of
sensations seized me, and I saw, felt, heard, and smelt, at the same time.
"
This part of the excerpt shows that the speaker is experiencing impulses of a newborn who is just starting to be aware of his senses.
Part II
"I knew, and could distinguish, nothing."
This reflects innocence and lack of experience or knowledge.
Part III
"Sometimes I wished to express my sensations
in my own mode, but the uncouth and inarticulate sounds which broke from me
frightened me into silence again.'
This mirrors a baby's innocence and puerile attempt to express feelings.