Vladimir Solovyov
Blaise Pascal, Arthur Schopenhauer, Friedrich Nietzsche, Gustave LeBon, Dmitry Merezhkovski, Henri Bergson, Sigmund Freud, Carl Gustav Jung, Miguel de Unamuno, Jose Ortega y Gasset, Søren Kierkegaard, Vladimir Solovyov, Lev Shestov, Nikolai Berdyaev, Thomas Mann, Cicero, Horace and several others.