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 please 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.}