Who said "The stranger becomes friend through shared trials"?

This quote is attributed to Estraven.

The stranger becomes friend through shared trials - Estraven

"The stranger becomes friend through shared trials"

Estraven Friendship

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."

"Friendship is built on trust and honesty."

"True friendship is worth more than gold."

"Good friends are like stars, always there even when you can't see them."

"Friendship means sacrifice."