Definition & Meaning of "full of courtesy, full of craft"

What is the origin of the proverb "full of courtesy, full of craft" and when to use it?

The origin of the proverb "full of courtesy, full of craft" is not definitively documented, but it appears in various cultures and languages, reflecting a universal sentiment. The saying suggests that individuals who appear overly courteous or charming may be using these qualities as a tool to manipulate situations or achieve their own goals. It serves as a cautionary reminder that outward kindness or politeness may sometimes be a cover for ulterior motives, and it encourages being cautious when dealing with people who seem too flattering or smooth in their behavior.