“It’s not as if grace did one half of the work and free choice the other; each does the whole work, in its own peculiar contribution.”

Frequently attributed, often in the context of strikebreaking activities during the Great Southwest Railroad Strike of 1886. See for example Philip Sheldon Foner, History of the Labor Movement in the United States, Volume 2‎ - Page 50 (1975). A contemporary source has not been identified. Varying forms of the quotation circulated in the labor press as early as 1893, with or without the attribution to Gould.
Attributed

Source: The Literary Character, Illustrated by the History of Men of Genius (1795–1822), Ch. IV.

Nano Reid (1950)
Context: Each work of art is a complete entity existing in its own right and by its own particular logic. It has its own reality and is independent of any particular creed or theory as a justification for its existence. This is not to say that artistic development may be considered as a self-sufficient process unrelated to social reality, because art is always concerned with the deeper and fundamentally human things; and any consideration of art is a consideration of humanity. But it does mean that we cannot apply the principles and logic of the past to a new work of art and hope to understand it. The eternal verities with which the artist is concerned do not change, but our conception of art does, as does our conception of form, and these must be extended if we are to understand fully and basically the meaning of a new work. It is a complex matter, but the elemental principles are always simple. The mass of modern art theory that developed around the fantastic changes of this century's painting can be largely ignored; only one or two fundamental principles are important. Probably most important in the new aesthetics from the painter's point of view was the statement of Degas, seventy years ago, in his unheeded advice to the Impressionists. He spoke then of a "Transformation in which imagination collaborates with memory... It is very well to copy what one sees; it is much better to draw what one has retained in one's memory”…This attitude, and all it implies, underlines the work of practically every painter of importance since 1900. Ultimately, it meant that the day of stage props and models was gone, and that imagination was recognised as the most important quality in an artist.

Science - The Endless Frontier (1945)
Context: Scientific progress on a broad front results from the free play of free intellects, working on subjects of their own choice, in the manner dictated by their curiosity for exploration of the unknown. Freedom of inquiry must be preserved under any plan for Government support of science...

Question http://hansard.millbanksystems.com/commons/1988/jul/12/inequalities-in-london in the House of Commons (12 July 1988).
1980s

Letter to Elizabeth Otis, expressing dissatisfaction with L'Affaire Lettuceburg — a satire he abandoned in favor of work on what became The Grapes of Wrath (c. mid-May 1938) as quoted in Conversations with John Steinbeck (1988) edited by Thomas Fensch, p. 38
Context: You see this book is finished and it is a bad book and I must get rid of it. It can't be printed. It is bad because it isn't honest. Oh! the incidents all happened but — I'm not telling as much of the truth about them as I know. In satire you have to restrict the picture and I just can't do satire. I've written three books now that were dishonest because they were less than the best that I could do. One you never saw because I burned it the day I finished it. … My whole work drive has been aimed at making people understand each other and then I deliberately write this book, the aim of which is to cause hatred through partial understanding. My father would have called it a smart-alec book. It was full of tricks to make people ridiculous. If I can't do better I have slipped badly. And that I won't admit — yet.

Man and Socialism in Cuba (1965)

VI, 5
Meditations (c. 121–180 AD), Book VI

Michel Henry, Marx II. une philosophie de l’économie, éd. Gallimard, coll. « Nrf », 1976, p. 435
Books on Economy and Politics, Marx. A Philosophy of Human Being (1976)
Original: (fr) Comment le capital trouve sa substance et son essence dans le travail vivant, de telle manière qu’il provient exclusivement de lui, ne peut se passer de lui, ne vit que pour autant qu’il puise à chaque instant sa vie dans celle du travailleur, vie qui devient ainsi la sienne, c’est ce qu’exprime à travers toute l’œuvre de Marx le thème du vampire. « Le capital est du travail mort qui, semblable au vampire, ne s’anime qu’en suçant le travail vivant et sa vie est d’autant plus allègre qu’il en pompe davantage ».