We all experience highs and lows in our mood. But feelings of sadness, emptiness, and/or hopelessness may signal depression. With depression, sadness differs from ordinary unhappiness in that it can prevent a person from participating in their daily activities. Learn more from Behavioral Health Partners' July Blog Post. Behavioral Health Partners is brought to you by the YOURhealth employee wellness program, providing eligible individuals with mental health services for stress, anxiety, and depression.