"The Soul of Abraham Lincoln" by William E. Barton is a historical account written in the early 20th century. This work explores the evolution of Abraham Lincoln's religious beliefs, delving into the conflicting testimonies and diverse interpretations of his faith throughout various biographical works. The author aims to offer a comprehensive analysis, drawing on a wealth of evidence and contextualizing Lincoln's spirituality within the historical framework of his life. The opening of this volume sets the stage for a deep examination of the contradictory evidence surrounding Lincoln's religious views. Barton discusses how many biographies of Lincoln have presented radically different portrayals of his spiritual faith, some claiming he was an infidel while others argue for his strong Christian beliefs. The author outlines the intent of the book: to analyze this conflicting testimony critically and present a more nuanced understanding of Lincoln's spiritual life while illustrating how it evolved over time. The preface emphasizes the necessity of a dispassionate study amid a politically charged and often sensationalized landscape of Lincoln's religious beliefs. (This is an automatically generated summary.)