An idle remark made in passing may tell us considerably more
about its speaker than listening to him lecture for an hour on a prepared
topic.
Likewise, it is often the case that the little “asides” made
by the writers of the New Testament in the process of teaching are as
interesting as — and sometime even more interesting than — the subjects
themselves.
Nothing in scripture is simply there to fill up space. Even
incidental comments are full of important truth.