Luna Lovegood has become a very well-known name among witches and wizards everywhere. But why is this? She constantly pushed the boundaries between known facts and imagination. Between politeness and total bluntness. You can tell just by the way she talks. 

"Harry doesn't want to talk to us right now. He's just too polite to say so,"

When she said this, it was in a very polite tone, much like everything else she says. However, she says these kind of things in a way that tells you just how little she cares about what you think. She says this right to Harry's face, as if he was not even there. Luna was, and is, never afraid to say exactly what she thinks.

"It's a charm, actually. It keeps away the nargles," (about strange necklace)

In this situation, miss Lovegood was questioned about a strange necklace she was wearing. She explained, with no shame, why she was wearing the necklace. If more people could be like her, and not be ashamed of what they believe in, our world could be much more productive. Everyone could share facts and opinions, and get answers to their questions. If we could consider the most unbelievable answers to our questions, like Luna did, we could learn much more about our world.