Evil can't be determined by one act as they may be forgiven or they may fixed what they did by learning...everyone has equal chances and one action can't determine your future if you set to fix them.
I haven't read the writing or speech, "ain't I a woman" but from background knowledge, I know that rhetoric and rhetorical devices are used to persuade the audience of something.
As I don't know what the speech is about, I couldn't tell you what makes it effective but your answer is going to most likely be a type of rhetorical device.
Ask yourself...
What does the speech use more of?
- Alliteration
- Hyperbole
- Metaphors
- Similes
Those are some examples of rhetorical devices. I know I haven't read the speech but I hope I was at least some help :) Let me know if you have anymore questions.
True
do not make any promise if it cannot be kept