The Gemini zodiac sign is symbolized by twins from Greek mythology. Geminis are able to focus on two things at once, according to Chinese astrology. Key strengths of Geminis are that they are expressive, witty, energetic, intelligent, creative, and adaptable to change. They are also entertaining, quick learners, and generous. Weaknesses include moody and inconsistent nature, being difficult to understand, indecisive, and sometimes selfish with inconsistent work.