“Axiom 8. That the importance of any action is measured by the degree of pleasure or pain that it causes or prevents.”
Moral Inquiries on the Situation of Man and of Brutes (1824)
Help us to complete the source, original and additional information
Lewis Gompertz 9
Early animal rights activist 1783–1861Related quotes

William Stanley Jevons Letter to his brother (1 June 1860), published in Letters and Journal of W. Stanley Jevons (1886), edited by Harriet A. Jevons, his wife, p. 151 - 152.

[Shewhart, Walter A., Deming, William E., Statistical Method from the Viewpoint of Quality Control, The Graduate School, The Department of Agriculture, 1939, 88]
Economic Control of Quality of Manufactured Product,1931

As quoted by Swami Sadananda Saraswati in his Introduction to Autobiography of Swami Sivananda (2000 web edition) http://www.dlshq.org/download/autobio.htm
Context: The life of a mendicant during pilgrimages helped me to develop in a great measure forbearance, equal vision and a balanced mind in pleasure and pain. I met many Mahatmas and learnt wonderful lessons. On some days I had to go without food and walk mile after mile. With a smile I faced all hardships.

Source: A Short History Of The English Law (First Edition) (1912), Chapter X, Contract And Tort, p. 132

“Pleasure has desire in it. Desire is pain. There is no satisfaction. So pleasure is pain.”
Source: The Yellow Book, 1974, p.65