1. "I heard sounds from heaven;and I heard sounds from hell!"
2. "Listen! Listen!"
Explanation:
When the narrator is pointing something out in this way-by stating the dialogue in an urgent, anxious way, it creates a sense of anticipation in the audience/readers.
I'd say there are two answers here - she must obey her husband's wishes and follow his advice (he tells her not to teach Douglass how to read) and slavery strips her of her innate beliefs and benevolent nature (she used to be a kind and caring person before she got slaves).