Stefan Giger, Oliver Hirschi, Marc Jean-Richard-dit-Bressel, Rutger Leukfeldt, Mirjam Loewe-Baur, Nora Markwalder, Rick van der Kleij, Steve G.A. van der Weijer, Susanne van't Hoff-de Goede
Laotse, Francesco Petrarca, Marc Aurel, Voltaire, Friedrich Nietzsche, Platon, Blaise Pascal, Epiktet, Henry David Thoreau, Lucius Annaeus Seneca, Aristoteles, Rudolf Steiner, Konfuzius, Max Stirner, Étienne de La Boétie