Since Geminis are a mix of the yin and the yang, they are represented perfectly by the Twins. Less practical is the fact that you're not sure which Twin will show up half the time. Geminis may not know who's showing up either, which can prompt others to consider them fickle and restless. They can be wishy-washy, too, changing their mood on a simple whim. It's this characteristic which readily suggests the Mutable Quality assigned to this Sign.
Mutable people are flexible and go with the flow.
Further, the Twins are adaptable and dexterous and can tackle many things at once. It's a good thing, too, when you consider their myriad interests. The downside of such a curious mind, however, can be a lack of follow-through. Ruled as they are by the Planet Mercury, Geminis exhibit a delicious brand of mercurial energy. They are quick thinking, quick-witted and fast on their feet, much like the messenger god of Roman mythology that rules their Sign.