Those who love their relatives do not dare to be evil to others; those who respect their relatives do not dare to be rude to others

It means that a person who knows how to love his parents will not dare to hate others Parents; a person who knows how to respect his own parents will not dare to neglect other people's parents.

Language source:

"Lu's Spring and Autumn Annals? Filial Piety Chapter": "Therefore, love them When you are close, you don’t dare to be evil to others; when you respect your relatives, you don’t dare to be arrogant to others. To love and respect your relatives to the best of your ability, to bring glory to the people, and to the world, this is the filial piety of the emperor."

"The Classic of Filial Piety" ?Emperor Chapter": "The Master said: Those who love their relatives dare not be evil to others; those who respect their relatives dare not be rude to others. Love and respect are fulfilled in serving relatives, and moral education is imposed on the people and punishment is everywhere. Cover the emperor's Filial piety."