"Overthinking will destroy your happiness" highlights the detrimental impact of excessive rumination on one’s well-being. Overthinking often leads to increased stress, anxiety, and dissatisfaction, as individuals become trapped in negative thought patterns and what-if scenarios. This constant mental activity can prevent people from enjoying the present moment and appreciating positive experiences. To combat overthinking, it's essential to practice mindfulness, focus on the present, and adopt healthier thinking habits, ultimately fostering a more balanced and happy life.