Why do you say that brothers are clear?

Because of humanity! Everyone is selfish in front of interests, which is not derogatory, but a reality, because the intersection of brothers in your life is not very big, you have your family and circle to take care of, he has his, and you have more responsibilities in your own circle, so it doesn't matter right or wrong. But since we are brothers, don't care about small interests, it is best to live in harmony!