"Don't indulge in fantasy, don't indulge in empty voices" means: you can't imagine anything out of thin air, you can't pursue dreamy things without taking action. This sentence tells us to be down-to-earth, not to worry about ourselves because of vanity, to keep our original heart and to work hard for our dreams.

Don't indulge in fantasy, don't indulge in empty voices, this sentence comes from Li Dazhao's "Historical Essentials". Essentials of History embodies Li Dazhao's historical materialism. He initially used the world outlook and methodology of historiography to discuss six topics, such as what is history, what is history, the system of historiography, the position of historiography in science, the relationship between historiography and related knowledge, the study of modern historiography and its influence on life attitude. As a pioneer and pioneer, he made great contributions to the development of China's historiography.

The Essentials of Historiography is the first book that blazed a trail from the theoretical level and became the cornerstone of China's historiography theory. It has been three-quarters of a century since the publication of A Summary of History. Today, people will feel its theoretical charm and enlightenment more and more. Li Dazhao's belief in historical materialism is especially worth pondering by every reader.