“Communism is the opiate of the intellectuals [with] no cure except as a guillotine might be called a cure for dandruff.”

Source: The Angel's Game

Source: I Am Legend (1954), Ch. 17
Context: His sex drive had diminished, had virtually disappeared. Salvation of the monk, he thought. The drive had to go sooner or later, or no normal man could dedicate himself to any life that excluded sex.
Now, happily, he felt almost nothing; perhaps a hardly discernible stirring far beneath the rocky strata of abstinence. He was content to leave it at that. Especially since there was no certainty that Ruth was the companion he had waited for. Or even the certainty that he could allow her to live beyond tomorrow. Cure her?
Curing was unlikely.

7:87
Variant translation: What cannot be cured by medicaments is cured by the knife, what the knife cannot cure is cured with the searing iron, and whatever this cannot cure must be considered incurable.
Aphorisms

The Relentless Tenderness of Jesus https://books.google.com/books?id=xvv4HcYdxd0C&pg=PA42&dq=%22Those+who+have+the+disease+called+Jesus+will+never+be+cured.%22&hl=en&sa=X&ved=2ahUKEwi9_f7L-JTkAhXJ1VkKHfSGDHUQ6AEwAXoECAEQAg#v=onepage&q=%22Those%20who%20have%20the%20disease%20called%20Jesus%20will%20never%20be%20cured.%22&f=false (1986), p. 42
1980s
Source: The Ragamuffin Gospel: Good News for the Bedraggled, Beat-Up, and Burnt Out

Source: Paradise Lost

Widely attributed to Dorothy Parker and to Ellen Parr, but the origin is unknown.
Attributed

Corgan, William. Interview. Playboy. (Month?), 1997.

Detached Thoughts http://books.google.com/books?id=vVdSAAAAcAAJ&q=%22Marriage+is+the+cure+of+love+and+friendship+the+cure+of+marriage%22&pg=PA384#v=onepage, first published in Letters and Works of Philip Dormer Stanhope, volume 5 (1847)

Source: Flight: A Quantum Fiction Novel (1995), Ch. 32