הלכה על ברכות 119:19

Therefore, one who enters a city and hears the sound of shouting due to some sort of calamity that occurred in it and says, "may it be [God's] will that [that shouting] is not from within my house", has uttered a vain prayer, for this prayer is regarding the past and whatever has happened has already happened. But he can say, "I trust that it is not from my house" if he is wholly righteous. This is akin to the story of Hillel the Elder, regarding whom it is said: He shall not be afraid of evil tidings; his heart is steadfast, trusting in the Lord (Berachot 60a). The matter can be explicated in two ways: (1) in its simple rendering- that he is not afraid that it was coming from his house or (2) because he had accustomed his household to accept everything with joy, both the good and its opposite. Therefore, even if, God forbid, some calamity had taken place, they would not scream, but would rather accept it with love and silence. ...