Christianity. At the start of the narrative, Renan sets a reflective and personal tone, expressing a deep connection to his late sister Henriette, who inspired him during his writing process. He conveys his intention to create a comprehensive history of the origins of Christianity, outlining the four main parts of the work, with this first book focusing primarily on Jesus himself. Renan discusses the various sources of information available about Jesus and indicates his critical approach to understanding the historical context that shaped the life of this influential figure. He emphasizes the importance of credible sources, both biblical and extra-biblical, while also acknowledging the presence of legend and myth surrounding Jesus's story. This introductory section lays the groundwork for a complex exploration of the foundations of Christianity through the lens of Jesus's life. (This is an automatically generated summary.)