Many people I know, and also interact with always speak of Karma.
The idea of Karma (good and bad) is that if you do something positive, it could be helping one in need, somewhere down the lines of your life, someone else will do something good for you. The same goes for bad Karma, but completely the opposite.
I don't really believe in it, due to the fact that both a good thing or a bad thing would happen to you anyway in your life, despite what you do.
What do you think about Karma?