When you are discontent and irritable you are agitated and look for things to do....you are in "doing mode"
Your mind is the same, when not calm it constantly thinks, and if you are in negative thought mode, it searches and worries about anything and proceeds to exaggerate and makes up stories generating fear and anxiety.
If you were on a station platform and the next train came in ...destination noted as negative thought and anxiety don,t get on it, as it is going to Storyville. (We have the habit of getting on that train).
Instead say" no I,m waiting for the positive train"