What does it mean to read ancient books based on exegetics?

As the title. Exegetics refers to the use of modern Chinese to explain the meaning of words or words in ancient languages or dialects, which can be understood as the notes below classical Chinese in our Chinese textbooks. Because our country has a long history and culture, the pronunciation, meaning and usage of many ancient words have undergone profound changes. To understand and read through our ancient books, exegesis is essential. Therefore, reading ancient books depends on the exegesis of this book, which is based on exegesis (the so-called "book"). Zeng Guofan's good reading habits are indispensable to posthumous title's literary character.

Shortcomings, still hope to advise.