A person with a cold heart can only show their love by being cold

People whose voices were filled with sarcasm, hostility, coldness, and arrogance are often people who thinks that they are free from the smallest of sin at all.

I could forgive you even your cruelty if it were not for your calm.

She was cold by nature, self-love predominating over passion; rather than being virtuous, she preferred to have her pleasures all to herself.

I’m a cold-hearted bastard. I’m insular, I’m jaded, a workaholic, I’m ruthless and I’m self-serving. I don’t do forever, I rarely even do “I’ll call you tomorrow”. And just because I’m here now it does not mean if you ask me to stay I will.

He's not some cold-hearted killer who went to the hospital out of a show. He was extremely upset and distraught to the point of severe depression that evening.