Who said "The heart may be warm, but the mind must remain cold."?

This quote is attributed to Mr. Freeze.

The heart may be warm, but the mind must remain cold. - Mr. Freeze

"The heart may be warm, but the mind must remain cold."

Mr. Freeze Wisdom

"I'm not a human anymore. I'm something... colder."

"My wife, Nora... she's all that matters to me."

"Vengeance is a cold dish best served frozen."

"The cold never bothered me anyway."

"I'm not angry, I'm just disappointed."

"The best things in life are free."

"You can't have everything in life, but you can have what matters most."

"A woman's intuition is rarely wrong."