All the fairy tales of Aladdin, or the invisible Gyges, or the talisman that opens kings palaces, or the enchanted halls underground or in the sea, are only fictions to indicate the one miracle of intellectual enlargement.
The difference between a parable and an apologue is that the former, being drawn from human life, requires probability in the narration, whereas the apologue, being taken from inanimate things or the inferior animals, is not confined strictly to probability. The fables of Æsop are apologues.