Substance Accidents Species

Three words carry the chapter.

Substance means what a thing is at the deepest metaphysical level. Accidents are properties such as taste, color, weight, and visible form. Species names the sacramental appearance under which the reality is received.

Aquinas argues that after consecration the substance of bread does not remain. The accidents of bread do remain.¹

This is scholastic language, but the pastoral point is concrete. The consecrated host is adored as Christ’s body while still appearing as bread.

The doctrine is coherent on its own terms. It is not a crude claim that bread is physically disguised meat.

For Staff of Life, the key is the preserved surface. The sacred object still meets the body through bread’s sensible form.

That is where metaphysics and physiology begin to touch.

Related sections: What Changes; Natural Operations Remain.