Iron and Man behaves same

You know iron is the most powerful metal and it's really difficult to break. But you know that iron cuts iron and it's obvious. No other thing has power to cut iron. Same thing happened with a man. Man is the most powerful human being of this world but with certain conditions. Because man continues to struggle and achieve so much in his life if he avoids the negativity. But whenever he brings jealousy of other people in his mind his era of pain starts. And behave same as iron and his life destroy due to negative thinking for other people which means that those people cause his life full of worries but it's just because of him not anyone else.