The modality of a sign defines its expression. A sign will either be Cardinal, Fixed or Mutable.
Cardinal signs shape and influence. They are enterprising initiators of change.
The Cardinal signs are Aries, Cancer, Libra and Capricorn.
Fixed signs consolidate and preserve. They are determined and focused.
The fixed signs are Taurus, Leo, Scorpio and Aquarius.
Mutable signs adapt and adjust. They are flexible and fluid.
The mutable signs are Gemini, Virgo, Pisces and Sagittarius