Who said "The worst enmity is coldness; no hatred is so bitter."?

This quote is attributed to Zarathustra.

The worst enmity is coldness; no hatred is so bitter. - Zarathustra

"The worst enmity is coldness; no hatred is so bitter."

Zarathustra Truth

Character in Thus Spoke Zarathustra

"I teach you the Übermensch. Man is something that shall be overcome."

"One must have chaos within oneself to give birth to a dancing star."

"The snake that cannot shed its skin perishes."

"I love those who do not first look behind into the past before they look down at the abyss."

"Lucy, you got some 'splainin' to do!"

"You must always be honest with the people you love."

"Truth always comes out in the end."

"Honesty is always the best policy."