When Marshall Rosenberg speaks about a moment of his life, he thinks about what the other person is going through to get angry and direct him many bad words. Maria Engels comments about it and realizes that it is essential to have these thoughts while listening to people and not be affected by how people express themselves. Nonviolent communication is beyond speaking. It is related to listening as well.
You can check this on this video from 3:24 to 4:35:
Photo by Lagos Techie on Unsplash