Great quote. I’d like to emphasize that you should not be trying to impress the person you’re talking to, not trying to show how smart you are, and absolutely not trying to tell the person how stupid he is. Your goal is to educate her. You’re not even trying to convert. Just give the information in a way that’s as easy to understand as possible. Let your interlocutor come to her own conclusions. Being open and honest is the best way to give people the freedom to change their opinion.