"Get the other person saying 'yes, yes' immediately if you can." Start from points of agreement — keep the other person answering yes to small truths until the psychology of agreement makes the final yes feel like continuity. Then hand over the ownership: "let the other person feel that the idea is his or hers." Carnegie credits the method to Socrates, who "asked questions with which his opponent would have to agree. He kept on winning one admission after another until he had an armful of yeses. He kept on asking questions until finally, almost without realizing it, his opponents found themselves embracing a conclusion they would have bitterly denied a few minutes previously."

— In our words · Source: How to Win Friends and Influence People (Dale Carnegie)