Mercury in the 3rd house

The 3rd house rules everyday speech, writing, short journeys, siblings and early schooling, and Mercury is at home in it. Learning is quick, curiosity is wide, and these people usually read, write or teach in some form. They know their neighborhood and the people in it. Siblings and school years often shape how they think. Breadth comes easily and depth does not: the pull toward the next interesting thing can leave a lot of work half finished.