- Kahlil Gibran
- Harriet Beecher Stowe
- Paramahansa Yogananda
- G.K. Chesterton
- Walt Whitman
- Robert Frost
- Ralph Waldo Emerson
- T.S. Eliot
- Aristotle
- Thomas Paine
- Emily Dickinson
- Walker Percy
- Dean King
- Colin Fletcher
- John B. Hattendorf
- Carl Cohen
- Irving M. Copi
- J. Worth Estes
- Eugene Garver
- Arthur H. Robinson