Who said "Kindness is a weakness that only the foolish can afford."?

This quote is attributed to Plankton.

Kindness is a weakness that only the foolish can afford. - Plankton

"Kindness is a weakness that only the foolish can afford."

Plankton Kindness

"I'm ready to take over the world!"

"The secret formula is mine!"

"I'm going to steal the Krabby Patty secret formula and become rich!"

"SpongeBob, you're no match for my genius!"

"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."