Stoick — an adherent to the stoick philosophy teaching that self-control, a clear seperation between the outside world and the internal mental state of the potentially unaffected observer together with a perfect control of emotions, allow one to find peace within oneself and a position out of which one can act virtuously under all circumstances. Famous stoicks were the Greek philosophers Zeno of Citium, Cleanthes, Chrysippus, and among the Roman authors Cicero, Seneca the Younger, Marcus Aurelius, Cato the Younger, and Epictetus. Stoicism was fashionable among 17th- and 18th-century intellectuals due to its power to propagate virtue without appealing to one of the Christian religions.