Who said "The ice knows no betrayal"?

This quote is attributed to Estraven.

The ice knows no betrayal - Estraven

"The ice knows no betrayal"

Estraven Nature

Character in The Left Hand of Darkness

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"One cannot simply walk away from one's kethil."

"Winter is the time for stories, not for traveling."

"Forsivin! I had no forgiveness coming."

"Love is a country where borders are dreams."

"Nature teaches us about beauty."

"Nature teaches us patience and wisdom"

"Sometimes it snows in April."

"Every town has a soul, and Twin Peaks has a troubled one."