Who said "Kindness costs nothing but its value is infinite."?

This quote is attributed to Underdog.

Kindness costs nothing but its value is infinite. - Underdog

"Kindness costs nothing but its value is infinite."

Underdog Kindness

"There's no need to fear, Underdog is here!"

"When criminals in this city play, to steal the night and rob the day, they're out to make a dreadful mess, then Underdog is on the case."

"I'm just a pup who loves to help those in need."

"Even the smallest among us can make a big difference."

"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."