Karma is an action or deed or work. While it also refers to the spiritual principle of cause and effect where intent and actions of an individual. The principle of Karma is also known as the theory of karma or Law of karma. Also, it is believed that what goes around comes back by karma. There are types of karma: positive karma and negative karma. Good deeds result in positive karma. Whereas bad deeds result in negative karma. Karma is unforgiving and always gets payback. You cannot do harm to someone because someone has done harm to you. You will pay just like they will.
Here are some quotes on karma:
How people treat you is their karma, how you react is yours.
To go from mortal to Buddha, you have to put an end to karma, nurture your awareness, and accept what life brings.
Like gravity, karma is so basic we often don’t even notice it.
There’s a natural law of karma that vindictive people, who go out of their way to hurt others, will end up broke and alone.
Life will give you whatever experience is most helpful for the evolution of your consciousness. How do you know this is the experience you need? Because this is the experience you are having at the moment.