Being between Scylla and Charybdis is an idiom deriving from Greek mythology, which has been associated with the proverbial advice "to choose the lesser of two evils". Several other idioms, such as "on the horns of a dilemma", "between the devil and the deep blue sea", and "between a rock and a hard place" express similar meanings.
The mythical situation also developed a proverbial use in which seeking
to choose between equally dangerous extremes is seen as leading
inevitably to disaster.
Scylla and
Charybdis were mythical
sea monsters noted by
Homer; Greek mythology sited them on opposite sides of the
Strait of Messina between
Sicily and
Calabria, on the Italian mainland. Scylla was rationalized as a rock
shoal (described as a six-headed sea monster) on the Calabrian side of the strait and Charybdis was a
whirlpool
off the coast of Sicily. They were regarded as maritime hazards located
close enough to each other that they posed an inescapable threat to
passing sailors; avoiding Charybdis meant passing too close to Scylla
and vice versa. According to Homer's account,
Odysseus was advised to pass by Scylla and lose only a few sailors, rather than risk the loss of his entire ship in the whirlpool.