The Quirks of Online Communication

The first rules of online communication, known as net etiquette or netiquette, date back to mailing that is early and later Usenet. While the rules may vary by places, there are some guidelines that are simple are valid for most of the Internet and most of the time - as illustrated by the book of Netiquette by Virginia Shea, first published already in 1995. One of her "Ten Commandments" is: "Be forgiving of other people's mistakes".

We are all human, and nobody is perfect. Everybody can make mistakes at some point of their lives. Even if that mistake causes a disaster, we should keep in mind that mistakes are unintentional, and "What is done, is done.", nobody can roll back time, and fix their mistakes.

At a workplace, a colleague might make a mistake that might cause your company to lose millions. You, and other colleagues may get angry with him/her, and he/she may even get fired for that specific mistake. However, before getting angry, accusing him/her of doing it on purpose, saying bad things, saying "You could've ..."; you should stop, and imagine being in the same spot as that person. Maybe you lost your mother the night before, and didn't tell anyone about it. While thinking of your memories with your late mother, you made a mistake, and for that mistake, everybody got angry with you, you lost your job...

What I'm trying to say is; don't act before learning the source/cause of the mistake, you might hurt someone really deeply. Instead, try to talk things through with that person, and focus on decreasing the number of future mistakes. 

Although learning to forgive someone else is important, you should learn to forgive yourself too. Maybe you did something that hurt someone you love, it made him/her angry, and he/she stopped contacting you without even trying to listen to you, or your apology. You should reflect on your actions, think of ways to prevent future mistakes, and forgive yourself, as the person you loved didn't even spend 1 second to consider your feelings.