The blessed eldress [our holy mother among the saints, Abbess Makrina of Portaria] always taught her sisters and those who came to her for spiritual advice to give glory to God for all things: for the so-called good and the so-called bad. Here is a story she related regarding this:
In one of the villages near her monastery there lived a pious couple who had a ten-year-old son. Their next-door neighbour was an old woman with an intolerable personality. She was constantly berating everyone, angrily and unfairly scolding her neighbours, and when their son would return from school she would throw sticks and stones at him.
One day the father turned to God with fervent prayer and decided to ask Him how to deal with that old woman’s bad temper. The Lord answered him, “She will live another thirty years!” And what was the man’s response to this news? He unmurmuringly said, “Glory to God!” He shared God’s answer with his wife and she likewise said, “Glory to God!” When the son came home from school and heard the news about God’s answer to his father’s prayer he also said, “Glory to God!”
The next day, total silence reigned in the old woman’s house. She did not go outside to pour out her wrath upon her neighbours. The father went to see how she was doing and discovered that she had apparently died in her sleep. He began to pray to God in order to understand how this could happen, and the Lord said to him, “When you answered, ‘Glory to God!’ I shortened her life by ten years. When your wife gave the same reply I took away another ten years. And when your son said the same thing and also glorified Me, I took away the final ten years of her life.”
Source: Lessons from a Monastery