Dorothy: Dorothy realizes the her teenage naivety was just that, naivety, that there is no perfect place, and that all that she needs in life to be happy is already at her disposal.
Tin Man, Lion, and Scarecrow: All three of these characters realize that they do not need to rely on somebody else to feel better about themselves and that all that they were looking for, they, too, already possessed.
Lion: “You, my friend, are a victim of disorganized thinking. You are under the unfortunate impression that just because you run away you have no courage; you're confusing courage with wisdom.” Wizard
Wizard: The Wizard realizes that he can not deceive people to feel powerful.