As human beings we have two modalities that we operate in. The one is the modality of witnessing, of observation, of seeing. The second is a modality of acting. These normally oscillate.
Everything has a courtesy to it and you can define the courtesy as the rules that are concerned with the quality of what you are doing rather than the outcome of what you are trying to achieve. So it’s the rule whereby you give attention to the process rather than the outcome, what you are doing rather than the result.