>Two rules a wise female psychiatrist once told me:
>
>1) We can't change anybody else, only ourselves.

I assume you mean this in the narrowest of definitions, applying to the practice of psychiatry. If taken generally it's utterly false and exceptionally dangerous.

>2) We all are responsible for our own happiness.
>
>Not happy with what somebody else is doing? Don't expect the other dude to change or to take responsibility for your happiness.

If the other dude is doing something that's making you unhappy, and which is frowned upon by society at large, it's not unreasonable to expect the dude to change, or get changed e.g. someone pointing a gun at you for no good reason.

With that caveat in mind, I otherwise agree with 2).