Everybody has emotions and desires. Most of us was lead by our desires and influenced by emotions. Actually to be happiness is to live a calm life without any disturbance and fluctuations. However, you should also have a minimum material for your life. So you can go on with a calm life
Unfortunately, some of us are actually controlled by the emotions. When they feel anger. Actually, anger controls them, when they feel pity. Actually pity control them. They have no reasoning. They have no knowledge