The effect of these words or first the meaning is that the author, Sojourner Truth an ex slave is obliged to those who listened to her speech and is concluding her speech and has stated that while white women may be oppressed too their oppression is still not as much as black women have suffered with the added oppression of slavery. She also states that she can work just as hard as a man so deserves to have equal rights.
The "respectful, undermining" contradictory pair of words best describes how Mr. Brown is characterized. Mr. Brown is the first white missionary in the Umuofia and Mbanta from the "Things Fall Apart" novel written by Chinua Achebe. He respects every people in Umuofia and Mbanta including their leader. However, he always gives a new development to the people besides religion.
D he must watch out for Macduff