Nopony believes in those old pony tales... except the true ones.
In some sense, tales are didactic, teaching lessons or instilling values, sometimes preserving, in metaphor and inference, the truth of a painful past. But tales must never be stagnant. When the situation changes, new stories must enlighten a new generation.
By Order of their United and Equal Majesties of the Principality of Equestria, Princess Celestia of the House of Day and Princess Luna of the House of Night, with the help of the Ministers of Equestria and with a mind to advancing and honoring those citizens long neglected or never praised, come new stories to be read to children, and absorbed by the grown.