“Briarwood is the pretty poison. There is no cure for Briarwood.”

Source: Lord of Misrule

Source: Choke

I Talk Back to the Devil: Essays in Spiritual Perfection (1990).

Comparable to remarks of William Masters, in "Two Sex Researchers on the Firing Line" LIFE magazine (24 June 1966), p. 49: "Science by itself has no moral dimension. But it does seek to establish truth. And upon this truth morality can be built."
Variants:
Science does not have a moral dimension. It is like a knife. If you give it to a surgeon or a murderer, each will use it differently.
As quoted in Futurehype: The Myths of Technology Change (2009) by Robert B. Seidensticker
Science does not have a moral dimension. It is like a knife. If you give it to a surgeon or a murderer, each will use it differently. Should the knife have not been developed?
As quoted in Science & Society (2012) by Peter Daempfle, Ch. 6, p. 97<!-- also in Good Science, Bad Science, Pseudoscience, and Just Plain Bunk: How to Tell the Difference (2013) by Peter Daempfle, Ch. 9, p. 166 -->
Responsible Scientific Investigation and Application (1976)
Context: One of the most disconcerting issues of our time lies in the fact that modern science, along with miracle drugs and communications satellites, has also produced nuclear bombs. What makes it even worse, science has utterly failed to provide an answer on how to cope with them. As a result, science and scientists have often been blamed for the desperate dilemma in which mankind finds itself today.
Science, all by itself, has no moral dimension. The same poison-containing drug which cures when taken in small doses, may kill when taken in excess. The same nuclear chain reaction that produces badly needed electrical energy when harnessed in a reactor, may kill thousands when abruptly released in an atomic bomb. Thus it does not make sense to ask a biochemist or a nuclear physicist whether his research in the field of toxic substances or nuclear processes is good or bad for mankind. In most cases the scientist will be fully aware of the possibility of an abuse of his discoveries, but aside from his innate scientific curiosity he will be motivated by a deep-seated hope and belief that something of value for his fellow man may emerge from his labors.
The same applies to technology, through which most advances in the natural sciences are put to practical use.

Source: Drenai series, The Swords of Night and Day, Ch. 21
Context: "No golden age to discover now," he whispered. "No end to disease and starvation. No, bright sparkling cities reaching the clouds... All that I have lived for is gone now. I am so tired.""Then think on this, priest: You stopped the Eternal from finding greater weapons. Your actions here have led to her death. The world is free again.""Free? Of one tyrant perhaps. You think there will be no others?""No, I do not. But I know there will always be men to stand against them. You grieve because of a pure magic lost. That magic was corrupted by evil. This is how evil thrives. We find an herb that cures disease, and someone will make a poison from it. We forge iron to make a better plow, and someone will make a sharper sword. There can be no power that evil will not corrupt."

Down and Out in the Magic Kingdom (2003)

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

Paracelsus - Doctor of our Time (1992)