Why do you say that your son is raised and your grandson is your own?

Son is not filial, grandson is filial. The reason why the son is raised and the grandson is his own is because whoever is kind to the old man will kiss him. At their age, they need more care and companionship. My son is busy with his work and may forget to take care of them. Grandson often takes care of them with him. That's why sons are raised, and grandchildren are their own.