The law of karma is part of Buddhist teaching. The law of karma involves cause and effect.
It says that every event causes another event. The second event can be pleasant or unpleasant, depending on whether the first event was prompted by self-interested cravings or by pure motivations.
The second event can be so far separated from the first one that they don’t seem to be connected, but the connection is still there.
If our actions come from pure motivations, then the results will be positive, leading us to keep acting in positive ways.
If we are motivated by negative feelings, then the results of our actions will also be negative. And the effects of negative feelings can be cumulative. When bad things happen to us, we tend to respond negatively. This can lead to a vicious circle of negative actions and negative results.
Think of something negative that has happened to you. Then think of how you reacted to it. If you reacted negatively, did that negative reaction also affect the way you saw other things? If you reacted positively, did that positive reaction affect your outlook in positive ways?
Describe the event, your reaction, and how your reaction affected you.