What is the theme of the "Ain't I a Woman" by Sojourner Truth?be specific

"Ain't I a Woman," a speech given by Sojourner Truth at a
women's right to vote convention, is one of my students' favorites because it's real and
sensible--and humorous.  Truth is a strong black woman who actually won the first court
case against a white man in the nation, I believe--she sued a white man to buy her son
from him after he took her money but didn't release the son, if I remember correctly. 
In any case, this is one tenacious woman.  In this speech she is making a case for
women's rights by decimating the arguments put forth by all the speakers who came before
her on the podium.  She makes three primary
arguments.

First, she argues that the man who spoke before
her, claiming women are too fragile to bear the burden and responsibility of voting, is
not accurate in his assessment.  She says: 

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That man over there says that women need to be
helped into carriages, and lifted over ditches, and to have the best place everywhere.
Nobody ever helps me into carriages, or over mud-puddles, or gives me any best place!
And ain't I a woman?

She goes
on to say she has ploughed and planted and has done the work of any man--and can eat as
much as him if she's given the chance (an example of her
humor).

Second, the argument had been made that women do
not posess the same intellect as men  Sojourner Truth has an answer for that, as well. 
Her answer:

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What's that got to do with women's rights or
negroes' rights? If my cup won't hold but a pint, and yours holds a quart, wouldn't you
be mean not to let me have my little half measure
full?

Here's her final
argument in her own words:

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Then that little man in black there, he says
women can't have as much rights as men, 'cause Christ wasn't a woman! Where did your
Christ come from? Where did your Christ come from? From God and a woman! Man had nothing
to do with
Him.

This is a
witty and determined woman who spoke effectively and intellectually, despite her
pronounced dialect, about a subject she felt passionate about, clearly. She closes with
this:

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If the first woman God ever made was
strong enough to turn the world upside down all alone, these women together ought to be
able to turn it back, and get it right side up again! And now they is asking to do it,
the men better let them.

Her
theme is clear:  women are just as capable as men and should have the right to vote. 
I've included a great e-notes link (below) on Sojourner Truth which I think you'd find
interesting.