Who said "I believe in my heart there is a real need of suffering"?

This quote is attributed to Dmitri Karamazov.

I believe in my heart there is a real need of suffering - Dmitri Karamazov

"I believe in my heart there is a real need of suffering"

Dmitri Karamazov Perseverance

Character in The Brothers Karamazov

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"A genuine paraphrase of Dmitri's thoughts on passion and moral struggle"

"I am not mad; I am only unhappy"

"Beauty is mysterious as well as terrible. God and the devil are fighting there, and the battlefield is the heart of man"

"I could not bear the sufferings of children"

"Perseverance is the key to success."

"Don't give up on what you believe in."

"I've been through worse."

"You learn to live with the pain."