Duras

"This is not your world, human. You do not command here."

"I'm not here to command."

"Then you must be ready to fight. Something that Starfleet doesn't teach you."

"You may test that assumption at your convenience."

"I'm the only one, Worf! The only one who can prove your innocence! Kill me and you're a traitor forever!"

"Then that is how it shall be!"