Who said "Gratitude is a sign of weakness in this world."?

This quote is attributed to Zurg.

Gratitude is a sign of weakness in this world. - Zurg

"Gratitude is a sign of weakness in this world."

Zurg Gratitude

"Fear is the most delicious emotion of all!"

"I didn't become Emperor by being timid."

"Power is not given—it is taken."

"Every great villain starts with a dream."

"Gratitude makes life richer."

"A grateful heart is a happy heart."

"Respect those who came before us."

"Life's greatest treasures are the people we love"