Lazarus emphasizes the role of cognitive appraisal in stress and emotion. He argues that our emotional responses are not automatic reactions to external events but are mediated by our subjective evaluation of the situation. This process determines whether we perceive an event as threatening, challenging, or benign, ultimately shaping our emotional and physiological responses.

The book highlights the distinctions and connections between social, physiological, and psychological stress. By understanding these different dimensions, Lazarus provides a comprehensive framework for studying stress. This approach helps in recognizing how various types of stress interact and influence each other, offering a more holistic view of stress and its effects.

Lazarus explores the impact of stress on health, particularly its effects on the immune system and susceptibility to illnesses. He also discusses the relevance of cognitive-behavioral therapies in addressing stress-related disorders. By focusing on modifying maladaptive thought patterns and coping mechanisms, these therapies can effectively manage stress and improve overall well-being.