A man locked his son out of the house. The son thanked him. Explain.
The son, in his late teens, was spoiled and idle. The father correctly inferred that evicting him and forcing him to earn his own way would benefit him, however unpleasant it would be at first. When the son found a job and had worked at it for a while, he understood how his father’s actions had made his life more respectable and constructive, therefore he thanked his father.