I don't want it to be all that self-conscious or artificial, but it really grows out of my having invented myself as a listener so that I could hear her voice.
Espionage, for the most part, involves finding a person who knows something or has something that you can induce them secretly to give to you. That almost always involves a betrayal of trust.
But the best definition of it is to say that heaven is that state where we will always be with Jesus, and where nothing will separate us from Him any more.