In my experience overthinking leads to anxiety and depression comes about when you despair so much at your thinking and anxiety - or other things - that you give up and your thinking actually slows down, it's pure despair and exhaustion.
Thinking too much too repetitively and too fast tends to be anxiety.
Giving up and having your thoughts slow down to a crawl tends to be depression.
The "giving up" isn't a conscious decision it's more like a burnout when you just can't cope anymore.
http://www.scientificamerican.com/articl...ple-happy/ rapid thinking makes people happy according to this article, I haven't read it in a while but either in this article or another similar one it is also made clear that fast repetitive thinking creates more anxiety than happiness... and slow repetitive thinking tends to be more depressive than anxious.
So it's as much about repetitiveness as it is about speed. Very hyper fast thinking that isn't remotely repetitive can be more akin to mania, fast repetitive thinking to anxiety, slow repetitive thinking depression and slow thinking with variety is more a chilled out kind of happiness, supposedly.
The article could be complete bullshit of course I have no idea how reliable it is.
Thinking too much too repetitively and too fast tends to be anxiety.
Giving up and having your thoughts slow down to a crawl tends to be depression.
The "giving up" isn't a conscious decision it's more like a burnout when you just can't cope anymore.
http://www.scientificamerican.com/articl...ple-happy/ rapid thinking makes people happy according to this article, I haven't read it in a while but either in this article or another similar one it is also made clear that fast repetitive thinking creates more anxiety than happiness... and slow repetitive thinking tends to be more depressive than anxious.
So it's as much about repetitiveness as it is about speed. Very hyper fast thinking that isn't remotely repetitive can be more akin to mania, fast repetitive thinking to anxiety, slow repetitive thinking depression and slow thinking with variety is more a chilled out kind of happiness, supposedly.
The article could be complete bullshit of course I have no idea how reliable it is.