The words "Aim for the Stars" have important meaning to Cub Scouts. There have been many before us who have set their sites and lived their lives by Aiming for the Stars. And while they may not have made it on the first try, or the second, or even the third, they eventually do make it.
A Cub Scout who does his best like our motto says, is bettering himself. Sure, sometimes he may not "hit the stars," but he grows from his trying. He is preparing himself for greater attempts and for great successes.
Remember, not everyone makes their goals every time, but we all make the world a better place by doing our best and Aiming for the Stars. And isn't that what our real goal is in life?