Mecury rules Gemini and Virgo.
Mercury is the closest planet to the Sun.
Mercury is known as the swift messanger of the gods.
Mercury is said to be the mind, the intellect. This is partially true. A more comprehensive description of Mercury would be, Mercury is the way we understand ourselves as well as the physical, social & spiritual worlds around us. Mercury's sign and house placement reflects the energetic signature of how our mind will collect, sort & discern information. It represents how we communicate, what sparks our curiosity, & reveals what we are a voice for in the world. Our language, logic, timing, movement of our ideas, & mode of learning are all flavoured by our mercury signature.
Mercury is the impulse to be curious about life. Mercury seeks out experiences & opens doorways, both figuratively and literally. The Sun seeks experience, Mercury helps us understand experience.