 He further developed Neostoicism in his treatises "Manuductionis ad stoicam philosophiam" ("Introduction to the Stoic Philosophy") and "Physiologia stoicorum" ("Physics of the Stoics"), both published in 1604.Neostoicism is a practical philosophy which holds that the basic rule of good life is that the human should not yield to the passions, but submit to God.Neostoicism recognizes four passions