Duality of humans

Well, we are humans. The most wonderful creation of god. The most clever animal ever. We have emotions as not other animal have this quality. But at the same time humans have the most complecated thinking too. Humans are dual in nature. Humans think dual in nature. I have not just seen it but I have observed it too. We can see it in our daily life. Around us there we can see many example.
Assume you are having a quarrel with some one. And you say that you belong to a good family and you don't want a war. Just see the reaction from the other side. It can be like, I have more deciplined family than you. Or, I too don't have time to quarrel with you. Or, what do you think I am a villain. Or something like to prove he is better than you.
Now say just the opposite. Like you say " you know who I am. I can kidnapp you and you will not eveb know it. I can destroy you in no time". Now see the reaction. He will try to prove he is a superior villain than you. Its true and its human nature

Take another example. Father of a girl at the time of her marriage. He wants her daughter to be married in a high society family. He wants to give the less dowry. Wants the boy to be in control of his daughter. And many more comfort for the daughter. At the same time. Same father at the time of his son's marriage. He demand the hIghest dowry no matter how good or bad the son is. He never want to accept a girl from the low society. If his son gives more attention to his wife, they dont like it and starts insulting both the son and the daughter in law. Many more opposite things happens. No matter how much a boy tease the girls he don't like to his daughter to be teased. Great. Many more such things we can see around. Many more examples which show that we are dual in nature. We respond differently according to our own convenience at the same situation. We know it but always ignore. Just because we are selfish. We always see the profitables just for us. We love the same thing if its for us and hate it the most if its not for us. Someone is awesome if he helps us and the worst if he don't. We judge people according to our need, not to his/her ability. We expect to get help in need and don't want to help if someone is in problem. We want our friends to be always with us but at the same time don't even give him/her a call if s/he is far away. Or don't even ask about his health. We always think he will call but don't have time to dial. We are humans. We learn from mistakes. But sometimes ignore it too. Knowing all we don't want to change it. We can never change I. Fact. Humans will always be dual. If it changes it will be best thing which can happen. Hope it will.