just chiming in here, more to add a bit to what
for_his_glory has written than anything else...
personally, a lot of my "anger issues" improved as I came to the end of my my own "stuff" (self, flesh, what have you) and basically -had- to let The Lord take over. thankfully, it was never anything too, too, too dramatic or anything, just...
fear. for a number of reasons, fear was a bigger problem for me than straight up anger. fear mixed with anger and social rejection and labels and such = intense distress that resulted in psych labels. and now...
for me, remembering that "...perfect love casteth out -all- fear..." has been amazingly helpful. I came to a point where I had to just stop trying to out-think anger and fear, etc., and just...visualize Jesus, Crucified. I never thought I'd be one for visualization and such, but...
a born again cousin emailed me and reminded me to "get your eyes on Christ, and Him Crucified..." so the visual, disturbing as it may sound to some, was a quick and easy way of doing that, on a day to day basis.
to me, it all ties in with "..die to self daily..." and "it is no longer I who lives, but Christ who lives in me...," along with "ye must die to be Born Again." I vaguely recall reading...CS Lewis, probably some other super-brilliant Christian writers, too...
these things..."die to be Born Again..," for instance...represent both things that happen immediately, wherever in the invisible, supernatural realm these things happen...
and also happen gradually, day by day, playing out in the lives of us fallen, forgiven but imperfect human beings. so, there's that.