Mathematics, even the highest form, is still just opinion, or conjecture, not absolute reality.
Theology, when it comes from men, is just opinion as well. But our theology does not come from man. Yet, we have in ourselves, no language to convey this to our brothers on the other side of the gulf. We have to use the Words of God which quickens them. And after all, isn't that what the rapture really is, the quickening?
To an autonomist "reality" is all that is, the way it is
To an objectivist "reality" is that which exists
To tpaine, reality is all about us, and it is best defined by the bad things that happen when it is ignored.
To a mystic "reality" may include thought as substantive force and hence, a part of "reality"
To Plato "reality" includes constructs such as redness, chairness, numbers, geometry and pi
To Aristotle these constructs are not part of "reality" but merely language
To some physicists, "reality" is the illusion of quantum mechanics
To Christians "reality" is God's will and unknowable in its fullness.