https://en.wikipedia.org/wiki/Golden_Rule
Universal. When in doubt, assume the rule applies to you as it does to the most sensitive person you can imagine (your grandmother, perhaps). Put yourself in their shoes, and then apply the rule to them. Then treat that person in the same manner. This addresses the one major possible criticism of the Golden Rule ( https://en.wikipedia.org/wiki/Golden_Rule#Criticism )
Contact Tim Davis, DrTimothyAldenDavis@gmail.com. I take this very seriously.