Which line in the following excerpt from Joseph Conrad’s Heart of Darkness indicate a flashback?

Which line in the following excerpt from Joseph Conrad’s Heart of Darkness indicate a flashback? He paused. "Mind," he began again, lifting one arm from the elbow, the palm of the hand outwards, so that, with his legs folded before him, he had the pose of a Buddha preaching in European clothes and without a lotus-flower—"Mind, none of us would feel exactly like this.

it's called a epic poem i believe, hope this ☺

can you give us the options