I read a lot of books recently about filter. Not that I picked books about filter, but the books I read happened to talk about filter from different context. I thought it's quite interesting. Simply put, filter is a way to explain karma. Please don't recall what you know about karma. Let's just stick with filter.

The way we experience the world is the way we see the world. The way we see the world is from our past experience. That is, our past conditions the way we experience now. Every event is neutral in essence. My car's breakdown is neutral although I might be upset. But car mechanics has new business because of my car's breakdown. And after all, things break as a law of nature. So you see, things are as they are. They have positive/negative effects because of the filter you possess. Okay, at this point I know you are gonna pick on me on extreme events such as crimes and stuff. Don't get us there. So if I feel the world being unfair to be, I have to ask myself if I am fair to others. I know this theory doesn't make sense on the first thought. Try to reflect like this, and you will be surprised. I am practicing on this too. Another way to describe this is, if you wear color glasses, the world will be in color. If one sees others in an seducing/uninterested, fair/unfair, generous/taking advantage, etc way, the people around him/her will be in that way. Take off the glasses and see them as they are, one won't be rejected/cheated/used/etc.

Oh, what ever happened objectively still happened. A house was burned was a house burned. Filtering this event differently didn't deny the thing from ever happening. Filtering is related the way we perceive and affects our acts afterwards.

Okay, have fun and let me keep practicing :)