In all the corporeal beings, the formal principle is material. This is eminently true of the Body of the Universe. On Day One of Creation Week – the First Week of the World – God created the Heavens and the Earth – Water and Light. These elemental beings constitute the Material Body of the Universe whose formal principle gives mass, i.e., quantity (and thus all qualities) – to the elements, particles, etc – and arranges all things in a spherical and hierarchical order – something the modern scientist utterly misses.