But sometimes emotions can be too much for you to keep a lid on. 

They can boil over and create an ugly mess.  So messing for other and yourselves to clean up. 

Boiling food is an essential way for good cooking, likewise when you are in control of your emotions it is good too.

Psychological  counselling, such as at Sovereignty Christian Psychology can help you make sense of, understand and work with  your emotions in healthy ways without emotionally boiling over into an ugly mess.