It means: Young disciples should honor their parents when they go home, and love their brothers when they go out. From the Analects of Confucius? Study first.

The year of parents is indispensable. One is joy and the other is fear. -The Analects of Confucius

When Meng asked about filial piety, Confucius said, "Parents only worry about illness." -"The Analects of Confucius is Politics"