Actuality and Physicality
The Cube is the second and perhaps most well known of the Platonic Solids. It's eight corners connect twelve lines and in the process define six faces. Chances are better than 50/50 that you’re sitting in a room with cubic corners, three edges meeting in two points at both the floor and ceiling. It's highly probable that the chair you’re sitting on is also cubic, having 4 legs or 4 wheels.
The Cube is represents ‘Earth signs’ in astrology: Taurus, Venus and Virgo, and Capricorn. Science agrees with such 'grounding', as most natural solids and metals are cubic. Look at your favourite crystal and you may discover that it has a hexagonal habit.