"But how do I know the Light Side from the bad?"

A-HA! Gotcha. He never said this line. In Episode V, Luke asks Yoda, "...how do I know the good side from the bad?".

Fans are constantly tossing about this "Light Side" business. To quote the inimitable Yodafan776: "I personally don't like the term "light-side", as it does have that kind of turkey bologna connotation to me, too." Just so.

Perhaps one might catch Lord Vader strolling a SSD muttering, "Why do I always have to be the heavy?" but one would never find Yoda saying, "Ahh the Lite Side. Fluffier, creamier, Less Filling it is." To which a flabbergasted Mace Windu would sputter, "......Tastes GREAT!!"

Ad nauseum...

This business of a Light Side always sticks in my craw, though, seriously.

Again, this time in Episode VI, Luke gives the true nomenclature of the Force when he says:

"I can save him, I can turn him back to the Good Side."

By the way...a couple of Star Wars firsts for me yesterday. I watched all six episodes (do I have to say which order? The story order, stoopid!) back to back. This was also the first time I saw Episode III on DVD! I was waiting for this moment, and I declared a Star Wars Holiday.

Which is of course never to be confused with a Star Wars Holiday Special.