Let's say a Soviet exchange student back in the '70s would go back and tell the KGB about people and places and things that he'd seen and done and been involved with. This is not really espionage; there's no betrayal of trust.
“I am not an angel and do not pretend to be. That is not one of my roles. But I am not the devil either. I am a woman and a serious artist, and I would like so to be judged.”
“There is nothing respecting which a man may be so long unconscious as of the extent and strength of his prejudices.”