Step-by-step explanation:
Your essay could be this way;
Essay: Courtesy costs nothing, but buys everything
What comes to mind when you hear the word courtesy? ..well for many people, courtesy is kindness, for others it is an act of good education and respect for others, but what we can be sure of is that courtesy is a good habit or the best way that can exist to change the world, but why do we say this?
Courtesy can awaken other good feelings or qualities, even an act of courtesy can change the course of an argument or a misunderstanding; If the people around you are not generous or kind, with a smile or a good action that you do, you can make that person calm down or respond in a kind or courteous way.
Courtesy costs nothing, but it does do a lot of good, not only for the person who expresses it, but for those who receive it; Courtesy is contagious, so be nice, be polite, give a smile, those are some ways to show love and empathy for people and to make him better and better.