Which lines in this excerpt from "easter, 1816" by w. b. yeats suggest that the speaker had only a limited acquaintance with the people he is writing about?

i have met them at close of day
coming with vivid faces
from counter or desk among grey
eighteenth-century houses.
i have passed with a nod of the head
or polite meaningless words,
or have lingered awhile and said
polite meaningless words,
and thought before i had done
of a mocking tale or a gibe
to a companion
around the fire at the club,
being certain that they and i
but lived where motley is worn:
all changed, changed utterly:
a terrible beauty is born.
. .
hearts with one purpose alone
through summer and winter seem
enchanted to a stone
to trouble the living stream.

1. {i have passed with a nod of the head
or polite meaningless words,
or have lingered awhile and said
polite meaningless words,}

2. {being certain that they and i
but lived where motley is worn: }

3. {all changed, changed utterly:
a terrible beauty is born.}

4.{hearts with one purpose alone
through summer and winter seem
enchanted to a stone
to trouble the living stream.}