Sometimes we must deal with the unfairness to describe the meaning of fair. Is not the experience is one of the best teacher for our life? From experience, we will know the meaning of fair. And from that we will know how to find the truth. If we only want to use our logic, it does not enough for it. Perhaps our logic say it is an unfairness, but the reality is it fair. So, we must encounter the unfairness firstly; feel it, know it; and understand it.
The vital matter is we must learn from the unfairness and does not let it control our life. For it, we must have our stance and firmly defend it. If not, we will be a slave of unfairness.
"Abu Huraira reported that Allah's Messenger (may peace be upon him) said: "The believer does not allow to be stung twice from one (and the same) hole. This hadith has been narrated on the authority of Abu Huraira through another chain of transmitters." (Shahih Muslim)