Third House in Horoscope (The House of Hardworking and Siblings in Astrology)
The third house signifies hard work and the interaction with siblings and is a really significant part of the early life experience (before college years). It's an excellent journey of discovery and exploration, learning how to communicate, and also establishing power and independence. Physically, the next areas of the human body are the arms and shoulders. The importance of arms and hands also bring in manual dexterity. The correspondence with Mithuna (Gemini) adds communicating skills.