“Treat everyone with politeness and kindness, not because they are nice, but because you are.”
We often treat others badly out of ego or spite or difference of opinion. This is not good. As a true and respectful human it is our duty treat other human beings politely and nicely irrespective of their status, age, wealth or race. Even famous scientist Albert Einstein has also said that he speaks with everyone in the same language be he a president of the University or a Cleaner!