In the video, Robert Mack, an expert on the relationship between happiness and success, discusses his struggles with unhappiness and depression and how he discovered positive psychology. He emphasizes the importance of focusing on what is right with people and leveraging their strengths for happiness. Mack shares that he started taking steps towards a happier life, even if they were uncomfortable. For him, happiness became a life or death proposition, and he committed to living happily.

Relationship between happiness and success Positive psychology Struggles with unhappiness and depression Discovering the importance of focusing on strengths Taking steps towards happiness