Revelatory (adjective)

1. Revealing something new or surprising.
2. Providing new understanding or knowledge.

Origin:

From revelation + -ary.

Examples:

1. The new study provided revelatory insights into the causes of the disease.
2. The book was revelatory in its analysis of the political situation.
3. The interview with the former employee was revelatory, providing insight into the company's inner workings.
4. The newly discovered diary was revelatory, shedding light on the author's life and thoughts.
5. The revelatory evidence led to the conviction of the accused.