The whole doctrine of the providence of God consists of five main parts. First, a faithful servant of God should be absolutely convinced inside that all things happen by God’s decree and not by chance or by good luck or bad luck.
Caspar Olevianus, A Firm Foundation
I am publishing good material on this subject over at Faith of Our Fathers.
I think that, at a practical level, many Christians today do believe that some things happen by chance or by bad luck. They don’t know that this sort of thinking is idolatry.