Arcadia is like a really happy place where everything is perfect. It's like being in a magical land where all your dreams come true. People who believe in Arcadia think that it's a place where everyone is kind and there is no sadness or pain. It's like living in a fairy tale where everything is wonderful and nothing bad ever happens. People who talk about Arcadia might say that it's the perfect place where everyone lives in peace and happiness forever. However, it's important to remember that this is just a story and there is no such place as Arcadia in real life.