Moses sends out 12 spies to check out the Land of Israel. When they come back, two of them say: "It'll be a challenge to conquer, but it's real beautiful there, and worth it!" The other 10 say: "Uh uh, no way. The people who live there are giants. We might as well go back to Egypt, rather than trying to enter this land." You can look at the cup and see it half-empty or half-full. Think of a time when you tried to do something new. Did you give up in the middle because it seemed too hard? Or did you persist until you could snowboard down that mountain, do long division or play that piano piece?