Quantity, Aquinas explains, is distinguishable into two kinds: (1) dimensive (or bulk) quantity (molis) and (2) virtual or intensive quantity (virtutis).
While dimensive spatiality emerges extensively, virtual quantity, alternatively known as quality, comes about intensively.
As Aquinas declared, "In the consecration, the dimensive
quantity of the bread and wine are miraculously bestowed with being the subject of subsequent forms.
60) Joseph Owens, "Thomas Aquinas: Dimensive
Quantity as Individuating Principle," Mediaeval Studies 50 (1988): 289.