Who said "There is a whole world, whole worlds, beyond the walls."?

This quote is attributed to Genly Ai.

There is a whole world, whole worlds, beyond the walls. - Genly Ai

"There is a whole world, whole worlds, beyond the walls."

Genly Ai

Character in The Left Hand of Darkness

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"A frozen world is nothing to a man who knows the heat."

"How could you trust something that could become the opposite sex at any moment?"

"I do not know how to explain to you the extreme sense of isolation I feel."

"I had been afraid of the wrong thing, all along."