A lot of men create enemies by telling the truth in the most humiliating way possible. If you want influence inside real hierarchies, learn how to disagree without making the other person feel reduced, because once ego gets involved, people stop responding to logic and start defending pride.
Speaking of dialogues. This picture here represents a glacial one. It is the coldest and most devastating dialogue in the history of Moroccan cinema. I personally rank it among the Top 10 saddest dialogues in the history of world cinema.