An idea, or song, can usually be made better.

Even if it's just in the way it's presented. What's the difference between just doing something and putting your heart into it?
I would say it'd be the difference between just singing a song and this:





This is Halllelujah. A song first done by Leonard Cohen, then made more popular by Jeff Buckley (here's his recorded version). Here's Leonard's version. Watch and see if you get an idea why Jeff's made it more popular.




My thought? If you're really into something. If you convince yourself it's amazing. If you make it give you goose bumps. It'll be a lot easier to convince someone else it's awesome too.