Some have called it the "acceptable sin of the saints" since almost everyone does it, and few really label it what it is--sin.  And what is this wrong which we label "acceptable"?  It's worry!  And we ignore and justify doing it.  "I just can't help it--it's my nature!"  Besides, we justify, there is a great deal of difference between anxiety--justified concern--and real worry.  Perhaps!  But, I for one, am never sure when I've crossed that line and have allowed my sleep to be taken from me as I wrestle with issues when I'm praying about it, but worrying about it at the same time.