Sanger is known for her support and promotion of birth control, and that is what her analogy in the speech here is about; some couples are not ready, or even fit to be parents, so use birth control if you know nothing about growing a garden. Also, she convinces her audience that the use of birth control will control some problems in society. In the excerpt Ms. Sanger uses literary devices such as analogies and rhetoric to make her point. The diction she uses is that of a person