This is a concept I read about in a medium book, and one that for the most part I haven't liked because certain aspects seem unfair... I will reveal as this goes on.
The "law" is that like attracts like. It's most often applied to positive/negative thinking - that postivie thinking attracts positive events to you, and negative thinking attracts negative events. If it really does apply to events, this rewards happy douches and punishes their victims, making it totally unfair. It also puts the blame for how things go in our lives entirely on ourselves - it's like according to this law, if you get raped, it's your own fault for being too negative. Some things we do have control of, but not all. What also annoys me is how people try to take advantage of it, which kinda cheats the system.
I should add that this law only really rewards the bad+punishes the good in a dark world where most of the people are spiritual airheads, because events are really the result of the decision of the perp, so we can decide to go against the grain and help the sufferring, or bring the overconfident down a notch.
It goes beyond events... good people are attracted to what they believe is the good element in other people, and bad to bad. A good person would be naturally gravitated to heaven but not hell, whereas a bad person couldn't stand the people who'd make up heaven, or their view on things. When someone is where they don't belong they'd be an outcast, and become more polarised - only a taste of the opposite, whatever that be, would bring them back to a healthy middle (where they're fair and contented people).
Being attracted to bad people is actually a learning thing (their souls crave punishment to learn), whereas attraction to good is a reward. I would say I wish the law didn't apply to events but then, if it didn't, people couldn't get close enough for the above to happen. I suppose I wish the world was more balanced - so that there wouldn't be outcasts and everyone gets their just deserts, be it good or bad, and there'd be reward with growth this way, but maybe not the same level of isolation hell for outcasts to experience, which they might themselves need for growth.