Don't pass up an opportunity too quickly. :)

the sentence is quite misty... what relation does scenery have to your goals unless you are a National Geographic photographer?... no matter how many times i turn around -- my students cannot memorize more than 20 new words per day :( your translation is correct though

I would just "tweak" the syntax a bit ... "When we are in pursuit of our goals, we should turn and look back, because there may be better scenery behind us."

When looking for future solutions do not forget the past?