The Earth supports us, it is solid, stable, and unmoving. Too firm, and it will lock us into immobility. Its volume can be as slight as the speck of sand, or the tallest mountain.
Stability is critical in fencing. Proper stance, and stability will give the fencer's attacks, motion, and mobility a solid platform to execute from.
As a fencer, gaining the aspect of Earth in our stance allows us to empower our attacks, supports our defence, and pave the way for our mobility. Our enemies confront the pebble of sand or the umoving Mountain.