"Optimism: An Essay" is an important work written by the outstanding writer Helen Keller. In this book, the author examines the concept of optimism through her own experiences and observations. With the help of witty examples and philosophical reflections, she appeals to the reader with a message about the importance of a positive attitude towards life. "Optimism: Essays" is not only a thought-provoking book, but also an important guide in finding inner harmony and a bright outlook on the world.