A. . . he stretched out his arms toward the dark water in a curious way, and, far as I was from him, I could have sworn he was trembling. Involuntarily I glanced seaward — and distinguished nothing except a single green light, minute and far away, that might have been the end of a dock. When I looked once more for Gatsby he had vanished, and I was alone again in the unquiet darkness
This kind of structure of the story creates the perspective
of the main character through a detailed of opinion on what happened to his
life. The readers would be able to understand what went through his mind when
he went psychotic.