“An atheist is a man who has no invisible means of support.”

Our Relation to Others, § 23
Essays

Conversations with Carl Sagan (2006) http://books.google.ca/books?id=gJ1rDj2nR3EC&pg=PA70&redir_esc=y#v=onepage&q&f=false, edited by Tom Head, p. 70
Context: Those who raise questions about the God hypothesis and the soul hypothesis are by no means all atheists. An atheist is someone who is certain that God does not exist, someone who has compelling evidence against the existence of God. I know of no such compelling evidence. Because God can be relegated to remote times and places and to ultimate causes, we would have to know a great deal more about the universe than we do to be sure that no such God exists. To be certain of the existence of God and to be certain of the nonexistence of God seem to me to be the confident extremes in a subject so riddled with doubt and uncertainty as to inspire very little confidence indeed.

The Philosophy of Paine (1925)
Context: He has been called an atheist, but atheist he was not. Paine believed in a supreme intelligence, as representing the idea which other men often express by the name of deity.
His Bible was the open face of nature, the broad skies, the green hills. He disbelieved the ancient myths and miracles taught by established creeds. But the attacks on those creeds — or on persons devoted to them — have served to darken his memory, casting a shadow across the closing years of his life.
When Theodore Roosevelt termed Tom Paine a "dirty little atheist" he surely spoke from lack of understanding. It was a stricture, an inaccurate charge of the sort that has dimmed the greatness of this eminent American. But the true measure of his stature will yet be appreciated. The torch which he handed on will not be extinguished.

The Crisis No. V
Source: 1770s, The American Crisis (1776–1783)

Letter to L.A. Avilova (April 29, 1892)
Letters

A Bitter Rift Divides Atheists, NPR, 19th October 2009 http://www.npr.org/templates/story/story.php?storyId=113889251

Attributed by atheist activist Robert I. Sherman, reporting on remarks at a public press conference Bush held at O'Hare Airport on 27 August 1987 just after announcing his candidacy for president. Initially reported soon after the incident, years afterward disputes on the accuracy of the reports arose, as indicated at "Documents at Bush Presidential Library Prove VP Bush Questioned Citizenship and Patriotism of Atheists" (1 April 2006) at RobSherman.com https://web.archive.org/web/20150102092456/http://www.robsherman.com:80/advocacy/060401a.htm. Other journalists present have neither confirmed nor contradicted Sherman's account of the exchange. Sherman cites official correspondence about the incident between Jon Garth Murra, President of American Atheists, and White House Counsel C. Boyden Gray in December 1988, as clearly documenting that this was publicly reported prior to that time, and the accuracy of the remarks not contested, though implications of them in regard to actual stances on civil rights were.
Frequently misquoted as "No, I don't know that atheists should be considered as citizens, nor should they be considered patriots."
[1988, Fall, On the Barricades: Bush on Atheism, GALA Interim, Free Inquiry, 8, 4, 0272-0701, 16]
[1990-10-22, Do We Want Atheist Army?, Tom, Tiede, Waycross Journal-Herald, 73, 250, 3, http://news.google.com/newspapers?id=KltaAAAAIBAJ&sjid=yUwNAAAAIBAJ&pg=4651,702629]
Disputed

Responding to a question on whether he considered himself an atheist or an agnostic, in an interview at celebathiests.com (June 1996) http://web.archive.org/web/20061027073138/http://www.celebatheists.com/index.php?title=Tom_Lehrer
Context: No one is more dangerous than someone who thinks he has "The Truth". To be an atheist is almost as arrogant as to be a fundamentalist. But then again, I can get pretty arrogant.

Source: Interview with Piergiorgio Odifreddi in Incontri con menti straordinarie (TEA, Milano, 2007), ISBN 978-88-502-1523-2.