Noun
the thing of it
(idiomatic, colloquial) The important point to consider.
The thing of it is though that's the only way people know you, they see you in that roll and they see you in person and they only know the perception of what you are. David Selby
I have no doubt that there are great people about though... the thing of it is, nothing to this day moves me like classical music (Debussy, Vaughn Williams). Gary Lucas