Epicurus (341-271 B.C.) (just after the death of Plato) ... gave his name to Epicurean philosophy, wished to remove myth from explanation in order to improve understanding: 'Thunderbolts can be produced in several different ways -- just be sure the myths are kept out of it! And they will be kept out of it if one follows rightly the appearances and takes them as signs of what is unobservable.'   (Lennox p 49)