This quote is from the prequels film The Phantom Menace and it's when Qui-Gon saves Jar Jar's life. It's quite self-explanatory but that's the best thing about it. When you read it you can immediately understand what it means.

Just because you're able to talk doesn't mean that everything that comes out of your trap is going to make sense and it definitely doesn't make you smart. *Coughs in Jar Jar*