“There are times when the law jeopardizes those who obey it.”
Source: Pussy, King of the Pirates
Polly Peachum, in Act 3, scene 1, p. 74
Variant translation: The law was made for one thing alone, for the exploitation of those who don't understand it, or are prevented by naked misery from obeying it.
The Threepenny Opera (1928)
“There are times when the law jeopardizes those who obey it.”
Source: Pussy, King of the Pirates
As quoted in Little Journeys to the Homes of Great Reformers (1907) by Elbert Hubbard.
The Personality of Jesus (1932)
Context: The victims of greed and exploitation will never get justice solely by relying upon the vision and generosity of those who hold power and seek their own gain. Power is blinding and corrupting and causes the slave-owner to imagine that it is his duty to perpetuate slavery. The victims of imperialism, in a world where national egotism and greed are rampant, must resort to coercive action if they are to secure freedom and justice.
Book XXIII, ¶ 7,as rendered in the epigraph to Ch. 3 of The Lathe of Heaven (1971) by Ursula K. Le Guin, based upon the 1891 translation by James Legge, Le Guin was subsequently informed that this was a very poor translation, as there were no lathes in China in the time of Zhuangzi. The full passage as translated by Legge reads:
He whose mind is thus grandly fixed emits a Heavenly light. In him who emits this heavenly light men see the (True) man. When a man has cultivated himself (up to this point), thenceforth he remains constant in himself. When he is thus constant in himself, (what is merely) the human element will leave him, but Heaven will help him. Those whom their human element has left we call the people of Heaven. Those whom Heaven helps we call the Sons of Heaven. Those who would by learning attain to this seek for what they cannot learn. Those who would by effort attain to this, attempt what effort can never effect. Those who aim by reasoning to reach it reason where reasoning has no place. To know to stop where they cannot arrive by means of knowledge is the highest attainment. Those who cannot do this will be destroyed on the lathe of Heaven.
“Those who know, do. Those that understand, teach.”
This and many similar quotes with the same general meaning are misattributed to Aristotle as a result of Twitter attribution decay. The original source of the quote remains anonymous. The oldest reference resides in the works of George Bernard Shaw, Man and Superman (1903): "Maxims for Revolutionists", where he claims that “He who can, does. He who cannot, teaches.”. However, the related quote, "Those who can, do. Those who understand, teach" likely originates from Lee Shulman in his explanation of Aristotlean views on professional mastery: Source: Shulman, L. S. (1986). Those who understand: Knowledge growth in teaching. Educational Researcher, 15(2), 4 - 14. Stable URL: http://www.jstor.org/stable/1175860
Misattributed
Variant: Those who can, do, those who cannot, teach.
Es gibt zwei Sorten von Männern. Die einen verstehen 'etwas von Frauen', die anderen sind solche, die einfach 'Frauen verstehen'.
Netzkarte (1981)
“I am one of those who are made for exceptions, not for laws.”
Source: De Profundis
Source: The Roominghouse Madrigals: Early Selected Poems, 1946-1966