felix culpa
/ˌfiːlɪksˈkʌlpə/noun
1- Christian Theology the sin of Adam viewed as fortunate, because it brought about the blessedness of the Redemption【基督教神学】幸运之罪（指亚当之罪, 因其带来了救赎之福而被视为幸事）。
1.1
- an apparent error or disaster with happy consequences带来好结果的错误（或灾难）：
he presents the revolt of the Noldor as a felix culpa.
他把诺尔多起义描写成是一场幸运的灾难。
词源
Latin, literally 'happy fault'.