Complementary opposites, yin and yang, exist individually and by contrast, measured by both an absolute and relative scale.
Per the website, above, from Duke University,
Megalomania (officially dubbed
narcissistic personality disorder in 1980), a well known, and well studied psychological malady, includes
tenuous grasp on reality and a persecution complex (which is probably caused by all those people who are plotting against one).
Project MUSE - <i>Freud's "Megalomania."</i> (review)
The website, above, from Johns Hopkins University, shows that not even Freud (father of psychology) was immune from psychoanalysis (and the finding of megalomania). It serves him right for training others to do it.
Few admit to wrongdoing. Hitler might have thought that he was doing the world a favor by torturing to death millions of Jews. President Bill Clinton might have thought that he was doing the world a favor by letting the Hutu slaughter about 6 million captive Tutsis without lifting a finger to stop them (a modern holocaust of African Blacks). President W. Bush might have thought that he was helping God by killing in wars in Iraq and Afghanistan (if, of course, God was just kidding about that remark about "not killing)."
Instead of telling everyone around us how great we are (like the puff pieces that General Douglas MacArthur and General Wesley Clark wrote to the newspapers), we should be judged by others. Our greatness should not be penned by our own hand, and embellished.
On the other hand, some people have an excessively low opinion of themselves. I think that those who write in forums, fortunately, don't suffer from that malady, but feel themselves worthy of readers who actually pay attention to the things that they write.
The most important thing to realize is that we all can contribute to society by speaking up. Though often it is a negative contribution. Still, a tiny ripple is the first step to a wave of change.