Corrie Ten Boom in The Hiding Place relates an incident which taught her this principle. She and her sister, Betsy, had just been transferred to the worst German prison camp they had seen yet, Ravensbruck. Upon entering the barracks, they found them extremely overcrowded and flea-infested. Their scripture reading that morning in 1 Thessalonians had reminded them to rejoice always, pray constantly, and give thanks in all circumstances. Betsy told Corrie to stop and thank the Lord for every detail of their new living quarters. Corrie at first flatly refused to give thanks for the fleas, but Betsy persisted. She finally succumbed. During the months spent at the camp, they were surprised to find how openly they could hold Bible study and prayer meetings without guard interference. It was several months later when they learned that the guards would not enter the barracks because of the fleas.
-Sermons Illustrated November/December 1988