We are conditioned to avoid certain emotions. Our default response may be to smile, or to be angry, for example. We may be patterned to believe that certain emotions are bad. Experiencing the whole range of emotions is humanizing. It creates freedom within yourself and empathy for others.
Specific exercises deepen capacity to feel in all directions. You will have more nuance and less attachment to specific emotions. Learning to express well at an emotional level, instead of always using a mental response, leads you deeper into the truth of situations, beyond explanations.
Things that happen at a vibrational level are first sensed at an emotional level, later analyzed and explained at a mental level, and finally manifested on the physical level. So developing emotional fluency, emotional flexibility, emotional responsiveness is key living your life with the content you desire.