Who said "Betrayal is perhaps the greatest form of pain."?

This quote is attributed to Shallan Davar.

Betrayal is perhaps the greatest form of pain. - Shallan Davar

"Betrayal is perhaps the greatest form of pain."

Shallan Davar Truth

Character in The Way of Kings

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"I wish I could see the future."

"The parshmen are slaves, but they need not be."

"Words matter. Choose them carefully."

"Justice demands action."

"Lucy, you got some 'splainin' to do!"

"You must always be honest with the people you love."

"Truth always comes out in the end."

"Honesty is always the best policy."