“Whether or not the soul is immortal is a fact in nature and cannot be changed by any book whatever. If I am immortal, I am. If am not, no book can render me so. It is no more wonderful that I should live again than that I do live.”
My Reviewers Reviewed (lecture from June 27, 1877, San Francisco, CA)
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Robert G. Ingersoll 439
Union United States Army officer 1833–1899Related quotes
On how she would describe herself (as quoted in the book Chicana Ways: Conversations with Ten Chicana Writers https://books.google.com/books?id=yq0PkmCGWoEC&pg=PA205&lpg=PA205&dq)

and the same holds, of course, for many composers

Letter to a relative, (1861).
Context: I think I have fairly heard and fairly weighed the evidence on both sides, and I remain an utter disbeliever in almost all that you consider the most sacred truths [... ] I can see much to admire in all religions [... ] But whether there be a God and whatever be His nature; whether we have an immortal soul or not, or whatever may be our state after death, I can have no fear of having to suffer for the study of nature and the search for truth.

Letter to Nathaniel Macon (12 January 1819) http://books.google.com/books?id=oiYWAAAAYAAJ&q=%22Honesty+is+the+first+chapter+in+the+book+of+wisdom%22&pg=PA112#v=onepage
1810s
Burchill (1992) in The Spectator. 16 January 1992; cited in: Ned Sherrin (2008) Oxford Dictionary of Humorous Quotations. p. 170

" That Nature is a Heraclitean Fire and of the Comfort of the Resurrection http://www.bartleby.com/122/48.html", lines 22-24
Wessex Poems and Other Verses (1918)

“I cannot sleep unless I am surrounded by books.”