An important bridge between the theoretical understanding of emotions and psychological attitudes and their impact on physical health, as well as preventive and therapeutic interventions that can be applied in everyday life and clinical settings. A scientific understanding of the impact of optimism and pessimism on mental and physical health allows professionals to develop programs aimed at creating a positive attitude, thereby reducing the likelihood of psychosomatic symptoms and increasing a person’s resistance to psychological stress. Among the most important practical applications are therapeutic programs based on increasing optimism and reducing pessimism – cognitive behavioral therapy, which focuses on changing negative thought patterns and transforming them into more positive expectations. She also teaches people techniques for cognitive reappraisal, practicing gratitude, and reflecting on past successes as a means of strengthening a sense of control over situations. Interventions also include mindfulness exercises and relaxation techniques that help regulate emotional and physical stress responses and reduce the secretion of stress hormones, thereby alleviating psychosomatic symptoms: headaches, gastrointestinal disorders and heart disease. In addition, workplaces and schools use programs to promote optimism through problem-solving skills, emotion management, social support networking, and focusing on the positive aspects of everyday situations. These preventive practices promote psychological resilience, self-efficacy and psychological immunity, thereby reducing the likelihood of developing physical and psychological disorders caused by chronic stress. At the therapeutic level, this knowledge is applied in the treatment of patients with chronic psychosomatic disorders. Patients are taught to develop an optimistic attitude, control pessimistic thought patterns, and apply more effective coping strategies, which contribute to the alleviation of physical symptoms and an improved quality of life.