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LIBER. -- This appellation was given to Bacchus, for various reasons noticed by historians. Not from a license of expression, says Seneca, is the inventor of wine called Liber, but because he rescues the free mind from the thraldom of cares, and impels it with more quickness and greater boldness into all enterprises. His feasts were called Liberalia.
Macrobius affirms the Liber and Mars were one and the same deity. And it was under that notion that Romans worshiped both by the appellation of Pater.