Episode 1/Pilot: "Don't lie."
Episode 2: "Eat healthy stuff."
Episode 3: "Play fair."

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Episode 10: "Stand up for what you believe in."
Episode 11: "Think about others' feelings."
Episode 12: "Sometime you don't always get what you want."

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Episode 23: "Everyone makes mistakes, and you should forgive them when they're sorry."
Episode 24: "It's okay to cry sometimes."
Episode 25: "Never give up hope."

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Episode 39: "Uh, we forgot to have a moral for this episode."
Episode 40: "This episode contradicts one or more morals taught in previous episodes."
Episode 41: "Here's a moral which has very little to no application in real life and is more of a joke than an actual moral."

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Episode 50: "Nobody is a good person and you're stupid for not figuring this out sooner."
Episode 51: "Slight correction: there are maybe one or two good people, but they are powerless to end chaos and corruption."
Episode 52: "Your safety and comfort are both illusions and you're probably going to die soon."

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Episode 75: "Society is crumbling all around us and no one can stop it."
Episode 76: "No matter who wins, we all lose."
Episode 77: "What you believe in doesn't matter because nothing is within your control."

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Episode 98: "Morality is pointless, so we're not gonna bother teaching you things anymore."
Episode 99: "This is a recap episode of several past episodes because we wanted to clock out early."
Episode 100/Finale: "Be kind to people, even if they don't show kindness in return."