This is a rant, so I'm not looking for any advice. In my honest opinion, this is probably one of the worst things you could ever tell a mentally ill person especially when they can't always control what goes on in their mind. It's almost like saying "try to be more positive" or "don't worry." Some people's conditions are more severe than others, so generic positive phrases like this doesn't always have a positive impact on everyone.  If it was so simple as to setting your mind to doing something then a lot of us wouldn't be here in the first place. We all would have been able to turn off our brains and simply move on with ease.
 
The truth is that sometimes you can give your all to something and still not have it work out or get positive results. Sometimes you just don't succeed. That's life. Sometimes you do have limitations of what you can or can't do. I just wish that people wouldn't try to make you feel so bad when you're not accomplishing what THEY want you to do. I wouldn't feel as bad about myself if people wouldn't stop rubbing their success in my face either. I guess I'm just tired of getting unsolicited advice from people that's never been where I've been. Or I'm tired of getting advice in general.