Darkness and light are most obvious to us in the alternation of day and night. Still, humans can make light, and darkness is not limited to the night. When do darkness and light occur, and how do they affect our mood? Can light ever be harmful, and can darkness be good for us? This book has the answers, and these answers may surprise you!

• Empowerment and growth: the book shows that all emotions are equally important and we need them all.
• Simple concepts: The book introduces the fundamental concepts of light and darkness / laughter and crying.