Who said "The world is frozen, but the heart need not be."?

This quote is attributed to Estraven.

The world is frozen, but the heart need not be. - Estraven

"The world is frozen, but the heart need not be."

Estraven Hope

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."

"Every day is a new opportunity."

"Hope is what gets us through difficult times."

"I'm not your enemy, kid. I'm trying to save you."

"Redemption is a long road."