Cartoon: Understanding Interstellar

Person 1: “No, you don’t get it man — time itself is circular, without a beginning or end — that’s why humanity in the future will be one possible course humanity might have taken in the past, while past itself is a moment of the future —”
Person 2: “Ok, got it. So did you pay the parking assistant, or should I pay him?”
Person 1: “I paid him.”