What Goes Around Comes Around?I think this is a saying from English. Basically it means that if you do something bad something bad can happen to you! Of course, one person's bad is another's good, we live in such a messed up world. Messed up because of us, no other way!
The truth of karma is the truth os selfishness. If you are selfish and egoistic you will suffer some redress from karma. In Jewish terms this is called 'tikkun'. It is quite involved, and well, it makes you think about what you are doing more, if you don't want to spend lifetimes going around in circles.