“You are the salt of the earth; but if the salt loses its flavor, how shall it be seasoned?” (Matt. 5:13).
Jesus often asked question in his teachings. Asking questions gets the audience involved. It stirs up interest. It gets them thinking. It can also set them up to receive your answers.
“Or what man is there among you who, if his son asks for bread, will give him a stone? Or if he asks for a fish, will he give him a serpent?” (Matt. 7:9-10).
These are rhetorical questions for the answer is obvious: “Of course not.” Rhetorical questions help the audience to see what is obviously true but which they may not have considered before. Quite often, you will see their faces light up as the realization hits them. Also, by taking a true statement and turning it into a rhetorical question, you are now requiring the audience to become the authority on the subject, which makes them more amenable to agreeing with you.