Peter Drucker's article discusses how knowledge workers must manage themselves effectively in today's changing work environment. It emphasizes the importance of knowing one's strengths, values, and learning style in order to perform well and contribute meaningfully. Drucker also stresses taking responsibility for relationships with bosses and coworkers and treating oneself like a CEO by setting goals and plans to achieve results. Managing oneself, he argues, has become crucial as knowledge workers need to stay employable and outlive the organizations they work for.