The "Evil Empire" and the US Postal Service

Since I posted a few days ago on the US Postal Service (to which no one commented, btw), I have seen "300" which paints the Persian Empire as the personification of evil, degeneracy, and bad face art. Consequently I think it imporant for you to know that the motto,

"Neither rain nor hail nor sleet nor snow nor heat of day nor dark of night shall keep this carrier from the swift completion of his appointed rounds."

... is based on a passage from Herodotus describing the super efficient pony express service of the self-same evil Empire. Herodotus was impressed. In fact, the Greeks always had a love hate relationship with the Persians.

Don't know what the significance of this is, but I thought it was kind of interesting.