When things are not good it's easy to get discouraged. Discouragement can lead to depression and a sense of hopelessness and despair. The antidote, of course, is hope. We need to believe things will get better.
Although real life is not black and white, we can view it that way, as either good or bad. Maybe you've seen graphics that have part of a photo in black and white with one portion or half in color. It's a dramatic change and contrast. Faith enables a person to see in color.