Who said "Kindness costs nothing but is worth everything."?

This quote is attributed to Ryland Grace.

Kindness costs nothing but is worth everything. - Ryland Grace

"Kindness costs nothing but is worth everything."

Ryland Grace Kindness

Character in Project Hail Mary

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"I'm not stranded. I'm home."

"Science rules."

"Sometimes the only way out is through."

"I have to stay alive. That's the mission."

"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."