William Lilly (1602-1681) was an influential English astrologer and occultist, most renowned for his work in horary astrology, the practice of answering questions by casting horoscopes. Born in Diseworth, Leicestershire, Lilly surmounted the barriers of his humble origins through keen intellect and diligence. His seminal work, 'Christian Astrology' (1647), is considered a cornerstone text in the field and showcases his mastery of astrological technique and interpretation. Lilly's reputation as an astrologer was so esteemed that he became embroiled in the politics of his day, reputedly forecasting events of the English Civil War, which earned him both fame and notoriety. His autobiography, 'William Lilly's History of His Life and Times, From the Year 1602 to 1681,' is an invaluable primary source, offering insights into his life and the tumultuous era in which he lived. Written with candor and introspection, it paints a vivid picture of 17th-century England, replete with personal anecdotes and reflections on his professional practice. His literary style is characterized by a clear and direct narrative, peppered with astrological observations that reflect the zeitgeist. Lilly's contributions to astrology and his detailed diary have not only provided a historical account of his life but also chronicled broader societal undercurrents of his times, ensuring his continued relevance as both an author and an astrologer.