I'm just having a 10 min break from concentrating [!] on some work [loosely translated, I'm eating breakfast and having a rest from brandishing my paint brushes]
I had a breakdown, several years ago, and I think the only thing that got me through and fixed me back up again was proper medication and therapy.
The need to talk to someone who understood me
and who truly listened, even when I didn't make a whole lot of sense [nothing's changed on that front] pulled me back to the point where I started to cope again emotionally.
Your brother is on a long journey of discovery regarding 'himself' and really he just needs time and positive support.
For me, in some ways, I feel the breakdown was a catalyst to a new life where I could start to be more open and honest.