"The Sun’s entry into these signs marks the equinoxes and solstices. The first day the Sun is in Aries is the first day of Spring (in the Northern hemisphere). The first day he is in Cancer is the first day of Summer. The first day in Libra marks the beginning of Fall, and the first day in Capricorn is winter."

Description of sign elementes and qualities: cardinal/fixed/mutable , fire/earth/air/water, active/receptive.

"In describing a personality, it's important to check the mode of activity or the manner that a person adapts to circumstances in his/her environment. These modes of activity are sometimes referred to as the quadruplicities.  Modes or quadruplicities are divided into three groups of four planets each. Each group has one sign from each of the four elements. The three groups are the cardinal signs, the fixed signs, and the mutable signs.

"Astrology is mainly concerned with a narrow “belt” of space around the Sun’s apparent path across the sky. We call this belt the Zodiac and we divide it into twelve equal portions called Signs. Each sign is unique and has its own influence. They can, however, be grouped according to certain similarities. One way is by Element, or basic character. The other way to group signs is by Quality, or by how they tend to act. "