Who said "A single act of kindness is a beginning."?

This quote is attributed to Rosa Hubermann.

A single act of kindness is a beginning. - Rosa Hubermann

"A single act of kindness is a beginning."

Rosa Hubermann Kindness

Character in The Book Thief

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"I'm asking you to be quiet now."

"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."