A life told by the person who lived it is an autobiography. The author selects events, shapes a narrative, and presents a version of the self to readers. Unlike a private diary, the autobiography is written for an audience and therefore involves choices about what to include, what to omit, and how to interpret the past.

Some autobiographies aim for comprehensive coverage from childhood onward; others focus on a particular period or theme—a political career, a spiritual conversion, a struggle with illness. The form allows reflection that contemporaneous records cannot provide. Memory is selective and reconstructive, so the resulting portrait is always an interpretation rather than a complete factual record.

Readers approach autobiographies with a mixture of curiosity and skepticism. The voice is intimate, yet the author has every reason to present a favorable or coherent self. The best examples acknowledge complexity and contradiction. Whether the subject is a public figure or a private individual, the autobiography remains one of the primary ways human beings try to make sense of their own existence in writing.