The Third House is Gemini’s house. Gemini loves to communicate. He loves to chat . He is very social and engages in small talk well. The Third House is casual communication versus higher level communication of principles and theories. The Third house is early education. The Ninth House, it’s opposite, is Higher Education. The Third House represents the stage of life when the child learns to talk.He goes from manipulating the physical building blocks of his world, in the Second House, to communicating, verbally and with the written word. The Third House deals with one’s neighbors and casual friends, too.Hence, when we use the Third house with House Rulers, this is what we would apply.