Why, then, does God permit the holy patriarch to be burdened with this cross just as if he were not a saint, acceptable and welcome in God’s sight? It was done for our sake, that we may learn patience and consolation in adversity and may stop our mouth if similar calamities befall us too. For we are not better than such great men, and so we should not ask for a special good fortune but should accustom ourselves to this disciplining and testing of faith, consolation, and patience since, indeed, it seemed good to God to permit those unaccustomed and unheard-of monstrous calamities beyond that sweat of one’s face and common spiritual tribulations.
Luther’s works, vol. 6: Lectures on Genesis: Chapters 31-37 p 192