/lit/ - Literature

I was raised to think that, no matter how bad things are, they could be worse and even if it seems like its the end of the world it will all be okay eventually, and that struggles are very temporary in the grand scheme of things.

>for example
I lost my job, my car broke down, i got food poisoning, i got stung by a bee and im allergic, my friend got mad at me, im constipated, i broke my arm, i cant exercise for a whole month, cant get a girlfriend, foreveralone etc
>"but its all okay"

I dont believe in depression as a chronic illness, but i do believe that people can become very depressed, for many reasons. And i also believe that a depressed person can easily NOT be depressed if they try.

Now the question i ask is; Is it so wrong, or irrational to think that even if there is something going wrong in your life, to think positively, that "even though its bad, its still all good/going to be good eventually." And that bad things are just temporary and shouldnt change your perspective on even a single instance of a moment in your life?

Apparently, such positive thinking is characteristic of a mental illness. Would you agree?
In my case, i am a very rationale, realistic thinking person. but i always see the good, in even the bad. Optimism. Should optimism be a psychological disorder?