Yeah man we're all just gettin worse slowly, brains just deteriorating away. But we got a little bit of time to have fun with our brains before theyre completely zonked.
Simply put, psychedelics bring out whats already there. It can be good, it can be bad. It most cases, too much is often bad. Not necessarily "bringing out" anything thats already there, but your brain can just get twisted from too much tripping, the more and more trips you take that are too close together, the harder it is to come back to reality.
I dont think people should go around preaching how harmless "psychedelics" are, because they certainly are not. They are very powerful and useful tools, when used as such. As they are very powerful weapons to oneself, when used as such. It's all about being careful.
And yeah I mean to some extent you can "control" your mood, and how you feel. But I don't think you can cancel out your mood or personality disorder just by thinking about it. Mental illness is a tough thing to fuck with ya know