The musical communicated several valuable messages, among them the fact that what you look like on the outside doesn't always reflect what the inside is—in other words, an ugly pumpkin can still make a delicious pie.
In today's world, where looks is an obsession and material things often define a person's success, it's easy to forget that things aren't always as they seem. Ugly sweaters can come in beautiful packages, filthiness can lurk in beautiful homes, and, yes, wickedness can dwell in spotless jars of clay. Only God knows what lies within, and he will have the final word.
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"Many will say to me in that day, Lord, Lord, have we not prophesied in thy name? and in thy name have cast out devils? and in thy name done many wonderful works? And then I will profess unto them, I never knew you: depart from me, ye that work iniquity."