"Why is reality understandable or is it not?"

spilling crimson says.... Expected or accepted under the circumstances Reality  as actually exist, rather than as  may appear or might be imagined.
When Reality is often contrasted with what is imaginary, delusional, in the mind,then what is fictional or real?
 "You might disagree, but in my reality, everyone goes to heaven."
"My reality is not your reality."

Those statements are an example of opposite view and perception of what is real

Phenomena ,actual and conceptual are structured together define the Reality of the person who tries to map a complex of a shared or individual experience.

Our Reality is just only an ypothesis or is only what we can get away with? 

Muse-Resistance lyrics