I think a lot of people have heard this quote before, but I find it so important for people to hear it that I decided to share it anyways.
There's this phenomenon that people who were once bullied often turn into bullies themselves. It doesn't make that much sense, apart from the fact that they enjoy turning the plot around and being the one in control of the other.
I hate it.
The idea behind this quote is so great because nobody will refute the fact that darkness goes away when light enters. So the real solution to get back at your bully is to spread love and include people instead of excluding them.
This stops further bullying or at least helps against the one in your area and will make it hard for others to spread hate.
Fun concept, eh?