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Betsie is a foil to her surroundings because she seems to enjoy being at Vught, where she continues to minister to her neighbors. More importantly, Betsie teaches Corrie to forgive her greatest enemy, Jan Vogels who betrayed the ten Booms to the Gestapo. The recurring theme of betrayal and forgiveness reveals how important these concepts are to Corrie. She also learns why hating Jan Vogels makes her as guilty as he was for his actions.