Sidestepping direct engagement

A diplomat understands that there are moments to sidestep direct engagement. They don't teach a lesson whenever it might first or most apply; they wait until it has the best chance of being heard.

They can disarm difficult people by reacting in unexpected ways. They might nod in partial agreement to unfair criticism and declare that they've often said such things to themselves. In the face of a tirade, instead of getting defensive, the diplomatic person might suggest some lunch.