Why is Samuel Pepys known for being unusually honest about his own behavior?

Samuel Pepys is renowned for his extraordinary honesty because he wrote his diary primarily for his own use, rather than for public consumption. This private nature allowed him to record his life with a level of candor that is rare in autobiographical writing.1

Pepys did not merely document his public life as a naval administrator; he included intimate details that many individuals would typically conceal, even from themselves. He was remarkably frank about his personal failings, including his vanity, jealousies, and various meannesses of thought and conduct. Furthermore, he openly recorded his major infidelities and weaknesses, providing an unflinching look at his own infirmities and the broader frailty of human nature. By excluding nothing he deemed essential, Pepys created a record that serves as both a supreme work of art and an invaluable, vivid account of life in Restoration London.23