Our hearts are like a cup which has a limited emotional capacity. If our hearts are full of heavy emotions like hurt and sadness, anger and resentment, fear and anxiety, guilt and shame, there will be very little room left for emotions like peace, joy, and happiness.
These unacknowledged and unexpressed emotions will inevitably begin to impact our physical, emotional, and spiritual well-being. Stomach issues, headaches, sleep disorders, and fatigue may be present. Depression and anxiety disorders, irritability, and outbursts of anger may be evident. Addictions and compulsive behaviors may develop. Persistent feelings of shame and worthlessness may cause us to isolate from God and other people.
–Melissa Haas, Emotions 101