Who said "I cannot afford to be weak."?

This quote is attributed to Kaladin Stormblessed.

I cannot afford to be weak. - Kaladin Stormblessed

"I cannot afford to be weak."

Kaladin Stormblessed Strength

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."

"Strength comes from within."

"A woman should be proud of who she is."

"A strong woman can overcome anything."

"The only thing I'm good at is killing."