What is atheist activist?

Famous quotes containing the words atheist and/or activist:

“An atheist is a man who has no invisible means of support.”
—John Buchan (1875–1940)

“... as a result of generations of betrayal, it’s nearly impossible for Southern Negroes to trust a Southern white. No matter what he does or what he suffers, a white liberal is never established beyond suspicion in the hearts of the minority.”
—Sarah Patton Boyle, U.S. civil rights activist and author. The Desegregated Heart, part 2, ch. 10 (1962)