The great outward variety of religious life
with its many conflicting worldviews and practices
must somehow be matched by a commensurate inward capacity to comprehend and understand it.
This is obviously no small premise.
Nor is it just an academic matter that can be taught.
For those with highly specific or narrow religious commitments there is often a real difficulty here.
To be open even conceptually or momentarily to what another system is saying might be felt as a violation of one's own position and allegiances.