The word implies losing our ground. When we are distracted, we are no longer solid on the floor, the ground, of the present moment. Wall A wall, a single wall, defines separation. A single wall is a layer of information that cuts one space into two. Add even one more wall, opposite or adjoining, and you enclose space.
Walls rise from floors and express in and out .
Cradle, security ,mask, temple. There are culturally significant walls such as Hadrian's Wall - which though low enough to step over in places, ran for many, many miles, effectively slicing Britain. The only human made structure that is visible from the moon is The Great Wall of China, which is depicted in the West more as an ancient elevated highway than as a political idea manifested in this enormous structure which had enormous effects on the history of China. The Berlin Wall, the walls around The Warsaw Ghetto, the Wailing Wall in Jerusalem, all have served purposes perceived as sacred. Look at a corner, an interior corner, the right angle of two walls meeting.