Sun Tzu
Henry Stanton
Walt Whitman
Niccolò Machiavelli
Henry Gray
E.M. Berens
Dale Carnegie
Olive Green
Theron Q. Dumont
Melvin Powers
J.G. M'Pherson
Emily Post
William George Jordan
Agnes Ethel Conway
Thomas Paine
Mabel Hale
Elsie Lincoln Benedict
Warren Hilton
A. Alpheus
James Allen
Unknown
Sir Arthur Cotton
Henry Edward Krehbiel
Theodore Arnold Haultain
Andrew Murray
Various
Elizabeth E. Lea
Constance Johnson
Marcus Vitruvius Pollio
Rufus Estes
Paul Allardyce
Maria Montessori
Arthur Schopenhauer
George MacDonald
Aristotle
Arthur William Knapp
John Owen
L. Frank Baum
Frederick Boyle
Ida Coe and Alice Christie
Edwin E. Slosson
Wallace D. Wattles
Ambrose Bierce
Helen Fryer
Shaykh Hasan
Lilli Lehmann
P. R. Kincaid
P. T. Barnum
Anonymous