 The problem is that happiness is a fleeting emotion. When conditions change for the worse, it scurries out the door. But joy doesn't. Happiness and joy are different. Happiness is temporary because it's based on our external circumstances. But joy can be a constant state, something that is present no matter what is going on in our life. It is because joy is a result of God's presence with us. It's an internal condition that is unaffected by life's difficulties.