Do you have purpose?

When I was reading about the introduction, one of the things that caught me eye was the consider your purpose section. It is easy to write down a general purpose for your speech, but if you don't connect with that purpose. If you don't like that purpose or believe in the purpose, it will be like you don't believe in your speech. It is easy for a lot of use to think we'll my real purpose for this speech is so I have something to talk about on speech day that will get me a good grade, and allow me to pass the class. However, from what I understand, in order to give a good speech, you must believe in yourself and the speech. You must want to make that connection to the audience. You really have to have a good purpose, otherwise why bother talking about it? If you don't feel the topic is that interesting, that relevant, or that meaningful, then why are you subjecting other to that torture?