The essence
The word comes from the Latin cardo, meaning hinge. Cardinal signs are the hinges of the year. The Sun enters Aries at the March equinox, Cancer at the June solstice, Libra at the September equinox and Capricorn at the December solstice. In the Northern Hemisphere these open spring, summer, autumn and winter, the four moments when the balance of daylight turns. Ptolemy called Aries and Libra the equinoctial signs and Cancer and Capricorn the tropical signs, from a Greek word for turning.
In the natural zodiac, the cardinal signs line up with the four angular houses (first, fourth, seventh and tenth), the most visible and active points of a chart. So cardinal is about action you can see. It notices a need and moves toward it, often before anyone else has named the problem. It favors doing over deliberating, and it tends to feel that standing still is a quiet kind of failure.



