I can imagine a series of conversations between various folk of Middle Earth.
One elf (call him Finrod) to another (call him Daeron): "We know we're good for them."
Daeron to Finrod: "
They know we're good for them."
Later, Finrod to Beleg: "You know we're good for you."
Beleg to Finrod: "
You know you're good for us."
Later, Beleg to Turin: "They're good for us and you know it."
Turin to Beleg: "They're good for us and
they know it."
Later, Turin to Mim: "They're good for us and they know it."
Mim to Turin: "They
think they're good for you and you believe it."
Later, Mim to an Easterling: "Those Elves think they're the best thing since sliced pie."
Easterling to Mim: "Those Elves are good for nothing but trouble."
