Who said "Loyalty is the highest virtue."?

This quote is attributed to Estraven.

Loyalty is the highest virtue. - Estraven

"Loyalty is the highest virtue."

Estraven

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."