Be a man, do the right thing.
It is one of the most powerful sentences I have ever heard of.
easy to say, difficult to do.

又有人跟我说这个世界很不公平了，真是很sad的事。
这个世界是不公平的，很sad。
这个世界都这么不公平了，还有很多人整天希望它是公平的，更sad了。

When the world is built, it is not surposed to be anything that is fair. The powerful dominate, the weak obey, that is the rule.
If you really want to a fair world, be the powerful, and build it yourself...