As the reader opens page one of the Lew Wallace Autobiography, the title of the first section of the opening chapter "jumps out": "Belief in Christianity".
The following are from a section of the Lew Wallace Autobiography subtitled:
Lew Wallace Autobiography, pages 927 - 928:
In the year referred to above (1875), Lew Wallace was forty eight years old. One can infer from the above quote that the research and writing of Ben Hur was changing his "indifference" toward Christianity.
The publishing date of the Autobiography is 1906. Lew Wallace died February 15, 1905 at the age of seventy seven. Between the age of forty eight (1875) and the writing of his Autobiography, Lew Wallace's "Belief in Christianity" had made a dramatic change.
Lew Wallace Autobiography, page 1:
The above quote would seem the testimony of a "church going" Christian, but then on page 2 of the Autobiography:
I am not a member of any church or denomination, nor have I ever been. Not that churches are objectionable to me, but simply because my freedom is enjoyable, and I do not think myself good enough to be a communicant. None the less I believe in the Divinity of Jesus Christ; and that there may be no suspicion of haggling over the word "divinity," permission is besought to quote the preface of a little volume of mine, The Boyhood of Christ [Published 1892]:
"Should one ask of another, or wonder in himself, why I, who am neither minister of the Gospel, nor theologian, nor churchman, have presumed to write this book, it pleases me to answer him, respectfully--I wrote it to fix an impression distinctly in my mind. Asks he for the impression thus sought to be fixed in my mind, then I would be twice happy did he content himself with this answer--"
At this point of the narrative from Boyhood of Christ, Lew Wallace details his own Christianity:
"The Jesus Christ in whom I believe was, in all the stages of his life, a human being. His divinity was the Spirit within him, 'and the Spirit was God.'"
On page 926 of the Autobiography, Lew Wallace quotes the Book of Matthew (King James Version [KJV]) describing the beginning of Ben Hur:
very beginning of the book lies in a quotation from St. Matthew:"
Lew Wallace continues after the Matthew quote with an example of how he is "frequently with awe*":
"Far back as my memory goes of things read by or to me, those lines took a hold on my imagination beyond every other passage of Scripture. How simple they are! But analyze them, and behold the points of wonder!"
Noting Lew Wallace's specific beliefs concerning Jesus Christ, quoting once again from Boyhood of Christ (also quoted in his Autobiography): "The Jesus Christ in whom I believe was, in all the stages of his life, a human being. His divinity was the Spirit within him, 'and the Spirit was God.'"
Looking at narratives from the the Book of John concerning Christ as a "human being" "and the Spirit was God", one can find possible sources of Lew Wallace's religious beliefs:
3: 4 - 6 (KJV)
John 4: 23 – 24 (KJV)
6: 62 - 63 (KJV)