Walter R. Spalding
Gotthold Ephraim Lessing
Hendrik Willem van Loon
William Wallace
William Hogarth
Yrjö Hirn
William Caldwell
Johann Joachim Winckelmann
Porphyry (tr. Thomas Taylor)
Maurice Maeterlinck
Herbert Spencer
Johann Friedrich Herbart
Mary Parker Follett
Joseph Fort Newton
Rudolf Steiner
M. Schele de Vere
Avicenna (Ibn Sina)
J. B. Bury
Claude Bragdon
Michael Sendivogius & Paracelsus
W. B. Yeats
Rudolf Otto
Muhammad Iqbal
