“We want the mathematical genius - there is work for him. We want the literary genius - there is work for him, especially in my office. We want the scientific brain - there is more than enough work for him. We want the man of brains and we want the man of common sense and little brain. We want the man of initiative and the man of action, the methodical man and even the crank. We open our ranks widely to all.”

From an article originally published in the February 6, 1949 issue of "This Week" Magazine, from "Addresses Upon the American Road,Volume: Volume 8: 1955-1960." Developed in speech entitled "Moral and Spiritual Recovery from War" presented October 13, 1945, at 75th Anniversary of Wilson College at Chambersburg, Pennsylvania. "The Crusade Years, 1933–1955: Herbert Hoover's Lost Memoir of the New Deal Era and Its Aftermath", edited by George Nash
The Uncommon Man

Interview in Macworld magazine (February 2004)
2000s

Speech delivered in the gardens of the Shaab Hall (May 1, 1959).
Principles of the 14th July Revolution (1959)

Variant: If you want to communicate an idea to a man's brain, talk to him through his pecker. It's like an ear horn, y'all.
Source: Lothaire

The Great Chain of Life (1956), Chapter 9 "The Vandal and the Sportsman" http://books.google.com/books?id=Ydc0cooCB6QC&lpg=PA146&q="when+a+man+wantonly+destroys+one+of+the+works+of+man+we+call+him+vandal+when+he+wantonly+destroys+one+of+the+works+of+god+we+call+him+sportsman"#v=onepage. Iowa City: University of Iowa Press, 2009, p. 148.

In The Fourth Year (1918)

Commenting on the 'Negro Project' in a letter to Dr. Clarence Gamble, December 10, 1939. http://smithlibraries.org/digital/items/show/495 - Sanger manuscripts, Sophia Smith Collection, Smith College, Northampton, Massachusetts. Also described in Linda Gordon's Woman's Body, Woman's Right: A Social History of Birth Control in America. New York: Grossman Publishers, 1976.
(Note: There is a different date circulated, e.g. Oct. 19, 1939; but Dec. 10 is the correct date of Mrs. Sanger's letter to Mr. Gamble.)

Source: An Echo in the Darkness