Canada Month, June 1963. A later satirical version of this saying added to the end "Luckily, this is not difficult" (Paul Dickson, The Official Rules [1978]). See Eleanor Roosevelt 2
Elizabeth Cady Stanton, Susan B. Anthony, Matilda Gage, Harriot Stanton Blatch, Ida H. Harper (2017). “THE HISTORY OF WOMEN’S SUFFRAGE - Complete 6 Volumes (Illustrated): Everything You Need to Know about the Biggest Victory of Women’s Rights and Equality in the United States – Written By the Greatest Social Activists, Abolitionists & Suffragists”, p.2594, e-artnow