OK, that assertion may be overstating the case. Maybe the best line was “These are not the droids you’re looking for.” Or maybe it’s “Don’t get cocky, kid!” At any rate, “Do or do not; there is no ‘try'” is definitely one of them.
But I just saw that a line that Yoda speaks in “Episode V: The Empire Strikes Back” on the back of a sweatshirt at my neighborhood Starbucks, and couldn’t resist the temptation to get a picture of it. iPhone to the rescue!
Look closely and you’ll notice the quote is attributed to not just Yoda, but to “Yoda/Chukki.” Chukki is the woman wearing the sweatshirt. Turns out she’s a personal trainer and “Do or do not…” is a line that she has been using in her training since long before one of her clients told her that the line is in “Empire.” When she told me that all I could say was “well, great minds do think alike…”
Here’s the original scene from Star Wars: