The truth is fear. Weak people are scared of themselves. Opinions cloud the view. If we avoid them, we will understand everything. It is only our opinion about something that makes it good or bad.
People are insecure because they have no control over themselves or their environment, or both.
If someone is selfish it is only because the people around them allow it. Swim deep in the ether - love is silver in the eyes. If we think someone is stupid, it is only a reflection of ourselves. We are beautiful inside and out, there are not many of us about. If we do not understand something, it has not been explained properly.