What advantages does a biographer gain from knowing the subject personally?

When a biographer has a personal relationship with their subject, they gain the advantage of firsthand knowledge, which allows them to act as a direct observer of the subject's life. This "source biography" provides unique access to original materials, including intimate personal papers and the biographer's own testimony, which are often invaluable for historical record.1

By maintaining a vital relationship with the subject, the biographer can capture the "earthly pilgrimage" of the individual through direct observation. This approach has produced many masterpieces of the genre, as it allows the writer to document the subject's life with a depth of detail that is often impossible to achieve when relying solely on secondary sources or fragmented historical records.1

However, this proximity also introduces significant ethical challenges. The biographer must navigate the tension between their obligation to preserve historical truth and the potential for causing personal anguish to others. Because there is no universally agreed-upon standard of "biographical morality," the biographer must independently determine how much of their ascertained truth should be disclosed to the public.2