What does this hadith teach you?
It teaches me how important treating others is in Islam. You cannot label others or put them down or call them names. No matter what good deeds you are doing they will weigh nothing if your behaviour with people is bad. I personally would any day chose a companion who knows 1 hadith but their manners and treatment of others is good and they strive to have good opinion of others and not assume the worst possible. Than a sister who is an Alima but has anger and ego issues.
Reminds me of another hadith where Prophet salallahu aleyhi wasallam pointed to his heart and said “Eeman is Here”. Prophet Muhammad invested in people. He never let people feel they are less or stupid (please keep in mind if he wanted he could he was the best of mankind and no one was as good as him), everyone who met him felt they were his best friend, he was approachable, he overlooked faults, he gave people hope and made them feel good about themselves. He was a positive and driving force in everyone’s life.
Ya Allah help us follow the Sunnah of Prophet Muhammad (salallahu aleyhi wasallam) in manners, actions and deen - ameen ya rabbul alameen.
Abu Hurayra said, “The Prophet, may Allah bless him and grant him peace, was asked, ‘Messenger of Allah! A certain woman prays in the night, fasts in the day, acts and gives sadaqa, but injures her neighbours with her tongue.’ The Messenger of Allah, may Allah bless him and grant him peace, said, ‘There is no good in her. She is one of the people of the Fire.’ They said, ‘Another woman prays the prescribed prayers and gives bits of curd as sadaqa and does not injure anyone.’ The Messenger of Allah, may Allah bless him and grant him peace, said, ‘She is one of the people of the Garden.’”
{Adaab Al Mufrad}