What did mama tell Corrie about hapiness in chapter 3?

When Corrie asks her mother if they can help Tante Bep with her unhappiness, she receives an answer, which affects the entire biography. Mama’s remark that happiness depends on attitude rather than circumstance helps Corrie during the darkest moments of her life. Moreover, Corrie learns to care for the weak when she administers the blood sugar test for Tante Jans.