It's purpose to the zodiac is to expand our horizons through our thoughts. It is friendly, communicative and light hearted at its best. The cardinal-water sign. Rules the 4th house. Ruled by the moon.
Cancer is the worlds mother.
It is nurturing, protective and longs to wrap its arms around all that get close to its heart. Yet to protect its vulnerabilities it can develop a very hard shell that is nearly impossible to penetrate. Cancers are deeply reflective and introspective and are seldom understood as their world is emotional, psychic and empathic. Moodiness due to the fluctuating moon phases, possessiveness, depression and martyrdom. The fixed-fire sign.