Emotions are a part of us they help govern our lives, it is a part of being human. So may even say emotions are the human part. Emotions like joy and happiness make life worth living; they are beautiful they color or lives, with colors that can only be seen with emotional eyes. Anger usually seen as negative is really neutral and can go in any direction. Hate is more of a disease, a cancer that burns and rots everything it touches. Sadness is the agony of a heart and of a soul.
We have a habit of allowing our thinking mind to be overpowered by our emotions and that can lead us into trouble; Under the influence of strong emotion, we tend say and do things we should not and that can lead us to places where we can never return from. A mind clouded and blinded by emotion may make bad decisions. We must govern our emotions when we have to, when it matters. Every situation is different, times we may need emotional influence other times we may not.