Victimised thoughts ....

How does sibling rivalry occur as a result?

On the surface, it could be because the siblings just don't get along or are constantly fighting over due to fame, power and $$$.

What actually is the cause behind all these? Often, it is caused by the parents, who choose to favour on one and neglect or hurt the other(s).

There is no fairness in this world???

Yes! Some people slog like hell, yet they get all the bad things happening to them in life. They also struggle through for everything that they want before they get it or perhaps despite their efforts, they may never be rewarded. Others? Well, the lucky ones, they get it sometimes without even asking.

People tend to forget the good things you have done

This is so true. People remember all the bad things you have done, or the things you fail to do or not done well enough. However, they never remember the good things you have done.

Don't try to cover up, Don't try to avoid - it only shows you have something to hide

Yes, this is especially irritating when they are people close to you and they obviously have poor "undercover" skills.