“Prentice: Unnatural vice can ruin a man.
Rance: Ruin follows the accusation not the vice.”
What the Butler Saw (1969), Act II
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Joe Orton 50
English playwright and author 1933–1967Related quotes

“And to emphasize the bad name Caesar had won alike for unnatural and natural vice, I may here record that the Elder Curio referred to him in a speech as: "Every woman's man and every man's woman."”
At ne cui dubium omnino sit et impudicitiae et adulteriorum flagrasse infamia, Curio pater quadam eum oratione omnium mulierum virum et omnium virorum mulierem appellat.
Source: The Twelve Caesars, Julius Caesar, Ch. 52

Source: 1830s, Nature http://www.emersoncentral.com/nature.htm (1836), Ch. 8, Prospects

“A man given to vice is always an idealist.”
Dr. Malépine to Monsieur Arsène, the mayor of Fenouille, p. 61
Monsieur Ouine, 1943

Vice and Virtue, ii
The Note-Books of Samuel Butler (1912), Part II - Elementary Morality

“Iron has powers to draw a man to ruin.”
XIX. 13 (tr. Robert Fagles); Odysseus to Telemachus.
Odyssey (c. 725 BC)

Attributed to Marx (possibly in jest) in W. C. Privy's Original Bathroom Companion (2003).
Misattributed