We have not taken and we shall not take a single backward step. There must be no second class citizens in this country.
Source, in full
Letter to Adam Clayton Powell Jr. (June 6, 1953); Source: United States of America Congressional Record: Proceedings and Debates of the 84th Congress, First Session, Volume 101, Part 8, July 1, 1955 to July 19, 1955 (Pages 9697 to 11002), here page 9743.