by Mihaly Csikszentmihalyi is a foundational work in positive psychology that explores the state of "flow"—a mental state where a person is fully immersed in an activity with energized focus, full involvement, and enjoyment. The book argues that happiness is not a fixed state but something that can be cultivated by controlling our inner experiences. Key Concepts and Features of Flow

According to the author's research , the flow state is characterized by several core elements: Flow: The Psychology of Optimal Experience - Amazon.com