In Harper Lee's novel, To Kill a Mockingbird, how does Aunt Alexandra influence Scout spiritually?

In To Kill a Mockingbird, by Harper
Lee, Aunt Alexandra does influence Scout—surprisingly, though
"spiritually" in an unusual way to put it.

Throughout the
story, Aunt Alexandra is a thorn in Scout's side. First, Scout is a tomboy, and her aunt
struggles with the overalls she wears, the games she plays, the fights she has, and the
way she talks. Scout is anything but a young lady. Aunt Alexandra is rather a
straight-laced "southern belle," struggling with the relationship the children share
with Calpurnia because the housekeeper is black (though Atticus refuses to change a
thing about the way the household is run).

However, we see
the effect she has had on Scout on the evening when news of Tom Robinson's death arrives
at the Finch household; Aunt Alexandra shows the true nature of the woman she is, and
she must have influenced Scout as well because the youngster demonstrates her ability to
behave in a controlled and courteous fashion, even while tragedy has struck so close to
home.

'Oh,
Mrs. Perkins, [Aunt Alexandra] said, 'you need some more coffee. Let me get
it.'

...said Miss Maudie. 'Let me pass you some more of
those dewberry tarts...'

Aunt Alexandra looked across the
room at me and smiled. She looked at a tray full of cookies on the table and nodded at
them. I carefully picked up the tray and watched myself walk to Mrs. Merriweather. With
my best company manners, I asked her if she would have some. After all, if Aunty could
be a lady at a time like this, so could
I.