“Some people confess guilt to claim credit for the sin.”

The Influence of the Reformation on the Scottish Character (1865)
Context: It remains a lesson to all time, that goodness, though the indispensable adjunct to knowledge, is no substitute for it; that when conscience undertakes to dictate beyond its province, the result is only the more monstrous.
It is well that we should look this matter in the face; and as particular stories leave more impression than general statements, I will mention one, perfectly well authenticated, which I take from the official report of the proceedings:—Towards the end of 1593 there was trouble in the family of the Earl of Orkney. His brother laid a plot to murder him, and was said to have sought the help of a 'notorious witch' called Alison Balfour http://www.orkneyjar.com/folklore/witchcraft/balfour.htm. When Alison Balfour's life was looked into, no evidence could be found connecting her either with the particular offence or with witchcraft in general; but it was enough in these matters to be accused. She swore she was innocent; but her guilt was only held to be aggravated by perjury. She was tortured again and again. Her legs were put in the caschilaws — an iron frame which was gradually heated till it burned into the flesh — but no confession could be wrung from her. The caschilaws failed utterly, and something else had to be tried. She had a husband, a son, and a daughter, a child seven years old. As her own sufferings did not work upon her, she might be touched, perhaps, by the sufferings of those who were dear to her. They were brought into court, and placed at her side; and the husband first was placed in the 'lang irons' — some accursed instrument; I know not what. Still the devil did not yield. She bore this; and her son was next operated on. The boy's legs were set in 'the boot,' — the iron boot you may have heard of. The wedges were driven in, which, when forced home, crushed the very bone and marrow. Fifty-seven mallet strokes were delivered upon the wedges. Yet this, too, failed. There was no confession yet. So, last of all, the little daughter was taken. There was a machine called the piniwinkies — a kind of thumbscrew, which brought blood from under the finger nails, with a pain successfully terrible. These things were applied to the poor child's hands, and the mother's constancy broke down, and she said she would admit anything they wished. She confessed her witchcraft — so tried, she would have confessed to the seven deadly sins — and then she was burned, recalling her confession, and with her last breath protesting her innocence.
It is due to the intelligence of the time to admit that after this her guilt was doubted, and such vicarious means of extorting confession do not seem to have been tried again. Yet the men who inflicted these tortures would have borne them all themselves sooner than have done any act which they consciously knew to be wrong. They did not know that the instincts of humanity were more sacred than the logic of theology, and in fighting against the devil they were themselves doing the devil's work. We should not attempt to apologise for these things, still less to forget them. No martyrs ever suffered to instil into mankind a more wholesome lesson — more wholesome, or one more hard to learn. The more conscientious men are, the more difficult it is for them to understand that in their most cherished convictions, when they pass beyond the limits where the wise and good of all sorts agree, they may be the victims of mere delusion. Yet, after all, and happily, such cases were but few, and affected but lightly the general condition of the people.

Source: Works of Thomas Brooks, pp.413-4

The Satanic Bible (1969)

The Communistic Societies of the United States (1875)

The Sinfulness of Sin

Source: The Confessions of Catherine de Medici

The last lines of this stanza are often changed to "Be of sin the double cure, Save from wrath, and make me pure.".
Rock of Ages (1763)
Context: Rock of Ages, cleft for me,
Let me hide myself in Thee.
Let the Water and the Blood,
From thy riven Side which flow'd,
Be of Sin the double Cure,
Cleanse me from its Guilt and Pow'r.

Vol. 2, Ch. 10
Midnight Oil (1971)