Quaternary or triplicity. Fire signs: Aries, Leo, Sagittarius. Vitality, activity, authority, initiative, energy, enthusiasm. Enthusiasm, ambition, short temper. Some affinity with the cardinal signs. Earth signs: Taurus, Virgo, Capricorn. Firmness, practical spirit, material interests, hard work, concentration, prudence, method, selfishness, obedience. Air Signs: Gemini, Libra, Aquarius. Intelligence, reflection, study, assimilation, sharpness, diplomacy, social life. Water Signs: Cancer, Scorpio, Pisces. Emotion, feeling, feeling, inspiration, inconstancy, fantasy, inner life. This division is the most important. Each Fire sign is always opposed to an Air sign, and every sign of Earth at a Water Sign. Also in this case the pre-eminence of a group, for the number of planets that contains, must be kept present in the complex of the entire schema.