Who said "Kindness costs nothing but means everything."?

This quote is attributed to Kaladin Stormblessed.

Kindness costs nothing but means everything. - Kaladin Stormblessed

"Kindness costs nothing but means everything."

Kaladin Stormblessed Kindness

Character in The Way of Kings

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"A man can change his own future."

"I will protect those who cannot protect themselves."

"What if I'm stronger than I think I am?"

"They are like traders of emotion."

"A good man treats his wife with respect."

"Kindness always comes back around."

"The power of a smile can change everything."

"Kindness is weakness to some. Not to me."