It's bad to think you're better than other people.
Sandra loves singing and takes part in a singing contest.
Sandra wants to win the singing contest.
Sandra took a singing course before the contest to improve her singing skills.
Sandra does not practice her song hard enough before the contest because she thinks that nobody can beat her sweet voice.
Sandra is applauded by the judges and the audience for her excellent performance and wins the contest.
Sandra does not win the contest because the judges think her singing skills are not good enough.