"Yes, in my books I do edit myself to keep from becoming the Village Explainer"

This quote by Thomas Perry talks to the value of self-editing. Perry is recommending that he modifies himself to prevent becoming the "Village Explainer," which implies someone who is excessively excited to discuss things to others. This might be translated as a warning against ending up being too preachy or pedantic. Perry is suggesting that it is important to be familiar with how one provides info to others, and to be conscious of how one's words may be gotten. He is also recommending that it is necessary to be familiar with one's own biases and to be mindful of how they may influence the way one interacts. By self-editing, Perry is suggesting that a person can avoid becoming the "Village Explainer" and rather interact in a more effective and considerate manner.