黄道十二宫是根据地球南北极连接而成的线为轴心，每二十四小时自转一周而来的。十二宫代表的是所经验的地区、活动领域及演出的场景，每一宫都象征著人生的不同领域，也就是各行星能量散发的“地点”。十二宫还与十二星座息息相关，而十二宫的次序也与人生的进化历程密切配合。

The Third House is ruled by the Sign Gemini and the Planet Mercury. The Third House is commonly referred to as the House of Communication. In this House, much of the communication is going on between the individual and those he or she holds close: brothers and sisters, as well as neighbors. While communication here can be both written and verbal, it also has a conscious quality to it.

Think about kindred spirits and mental connections. This serves to highlight the role of intelligence within the Third House.

Intelligence, as viewed in this realm, is the analytical ability one possesses within his or her environment, specifically a basic grasp of things and a practical sensibility. We use this intelligence to help us work effectively within our world and with those in it. The Third House reminds us that it's okay to use our conscious skills, as well as a more reflective intelligence, in order to make our way. A symbiotic relationship with those we hold close is also part of the plan. Let's not forget that our minds are powerful, quick and dexterous. Some things will be well-thought out, others nearly automatic. Maximizing our sum potential is the key.

Harnessing our intelligence and sharing it effectively with others is the essence of the Third House. How do we best state our case with others, often those we love the most? Will our actions be true to our environment, and our planet, for all time? This brings to the fore emerging forms of intelligence-gathering, such as computers. Will they make or break communication as we know it? The questions posed by the Third House can be answered by listening to that House: think, process, share. 中文大意：
      第三宫由双子座掌管，守护星是水星。一般将这一宫称为“沟通”之宫。它代表一个人所处的环境，也显示着一个人的学习能力、沟通能力、兄弟姐妹以及亲戚邻居等关系。其中，体现心智的”学习能力“尤为突出，擅用这种能力，有助于我们提高工作效率。这些特点提醒我们，若想有所突破，既要利用好已掌握的技能，又要善于深入思考。挖掘自己的最大潜力更是关键所在。另外，与他人一起开发个人的潜能并进行积极有效的合作也是这一宫所反映的问题。多思、进取和分享，倘若能做到这几点，当遇到类似如何更好地向他人阐明自己所处的形势，行动对环境有什么样的影响以及怎样沟通等问题时，我们都可以迎刃而解。