I have been a CS Lewis fan since my youth. So I remember being impressed by his argument, in Mere Christianity, that Jesus was divine. He could not have been merely a great moral teacher, Lewis argued, for his claims were such that either he was mad, or evil, or truly the Lord.
These days, the argument, often called the trilemma and abbreviated (and changed a little) to Liar, Lunatic or Lord? is not so effective. It is important that we understand why.