Their basic mode of activity tends to be emotional and changeable according to the element. Too much mutable in a chart can result in lack of motivation, over emotionalism and too much tolerance and apathy. There are 4 elements, fire, air, earth and water. The elements describe the basic temperament of the sign. Strong, dramatic, enthusiastic, direct, outgoing, joyful.
Fire signs tend to be life lovers and embrace their interests with vigor.
They are optimistic and enthused for the most part but capable of theatrics and temper outbursts when angered. The air signs channel everything through their thought processes and tend to be tolerant and understanding. They are people oriented signs and extremely communicative. Physical, Material, practical, detail oriented. Earth signs handle things with responsibility, foresight and seriousness.