Here's why:
* Direct Account: Diaries are written by the person experiencing the events, offering a firsthand perspective.
* Personal Insights: They reveal personal thoughts, feelings, and opinions, providing a unique window into the individual's life and time.
* Historical Context: Diaries can offer valuable insights into historical events, social customs, and everyday life.
However, it's important to remember that diaries:
* Can be biased: They reflect the writer's subjective viewpoint and may not be completely accurate.
* May be incomplete: Diaries may not capture every event or thought.
Despite these limitations, diaries remain incredibly valuable primary sources for historians, researchers, and anyone interested in understanding the past.