If you learn to handle thoughts, work with thoughts, you develop mastery over emotions. Another thing is that when you have an emotion it is only thoughts that make it bigger. They can really blow up the emotion you are having.
An interesting aspect is how we create stories out of our thoughts and we don’t realise that we create the stories but we become victims of the stories that we create ourselves. Sometimes the stories can even become films, movies in our own mind from what has happened in the past and about what is going to happen in the future. We are sometimes creating very destructive films, movies, and we are the director, we are the producer, we are the actor, and we are the victim, all in that drama. I will give an example of what such a story is and how the story can become a kind of reality at that moment.
This is a story from the Buddhist literature. So there was a young monk who wanted to give up his robes. He hadn’t told his chief monk about his plans but one day the chief monk was having a headache, so he told this young monk to give him a massage, to rub some oil on his head. So while massaging his head the young monk was thinking: Now, maybe in a month or two I will be giving up my robes. And after I give up my robes, maybe I will find a job, and when I find a job I will get some money, and when I find enough money maybe I will find a girl and get married to this girl. But sometimes these wives can be impossible people and if my wife becomes difficult or impossible, I’ll give her a good beating. And he beat the old monk on his head!
We are laughing, but this is what we also do with our thoughts. So it shows that these thoughts can be so compelling, and that they can create fantasies for us and we take the fantasy as real. So there is a connection, a relationship, between the stories and emotions. In the Dhamma there is a very interesting Pali word to describe this process which takes place in our mind: papanca. What it means is constructing, manufacturing, concocting, projecting, all these things we do with our thoughts, and it is said there is a direct relationship between concepts and suffering. This is how our suffering is created.