Try to find someone with a sense of humor. That's an important thing to have because when you get into an argument, one of the best ways to diffuse it is to be funny. You don't want to hide away from a point, because some points are serious, but you'd rather have a discussion that was a discussion, rather than an argument.

This quote suggests that a sense of humor is an important characteristic to have when you are in a disagreement because it can be used to prevent the disagreement from progressing into an argument. Humor can be used to “diffuse the situation” and make the conversation more pleasant and less contentious. You should still be honest and speak your mind, but using a bit of humor in your discussion will help keep the conversation light and productive, rather than turning it into a full-blown argument.