In Buddhism, there is the teaching of karma. It is often explained like the financial system - if you take from someone, you have to pay back. If you have given to someone in the past, then he or she will pay you back. Such understanding of karma is based on fear and greed. On one hand if life demands a lot from you, then you call that a bad or heavy karma; if situation and people tend to accommodate or favor you, then you call that a good karma. Bad and good are now measured by the greed and fear in you. The true karma is your comfort zone. The narrower it is the more you demand of situation and people -  the more you see bad karma; the more spacious it becomes, the greater life has to offer to you.