“The mechanism of modern business is so delicate that extreme care must be taken not to interfere with it in a spirit of rashness or ignorance. Many of those who have made it their vocation to denounce the great industrial combinations which are popularly, although with technical inaccuracy, known as "trusts," appeal especially to hatred and fear. These are precisely the two emotions, particularly when combined with ignorance, which unfit men for the exercise of cool and steady judgment. In facing new industrial conditions, the whole history of the world shows that legislation will generally be both unwise and ineffective unless undertaken after calm inquiry and with sober self-restraint. […] All this is true; and yet it is also true that there are real and grave evils, one of the chief being over-capitalization because of its many baleful consequences; and a resolute and practical effort must be made to correct these evils. There is a widespread conviction in the minds of the American people that the great corporations known as trusts are in certain of their features and tendencies hurtful to the general welfare. This […] is based upon sincere conviction that combination and concentration should be, not prohibited, but supervised and within reasonable limits controlled; and in my judgment this conviction is right.”

The Art of Measurement (1525).

Signs of Change (1888), How We Live And How We Might Live
Context: Fear and Hope — those are the names of the two great passions which rule the race of man, and with which revolutionists have to deal; to give hope to the many oppressed and fear to the few oppressors, that is our business; if we do the first and give hope to the many, the few must be frightened by their hope; otherwise we do not want to frighten them; it is not revenge we want for poor people, but happiness; indeed, what revenge can be taken for all the thousands of years of the sufferings of the poor?

Source: Aphorisms and Reflections (1901), p. 241

Source: "The Engineer as an Economist," 1886, p. 428; Second paragraph
Context: To insure the best results, the organization of productive labor must be directed and controlled by persons having not only good executive ability, and possessing the practical familiarity of a mechanic or engineer with the goods produced and the processes employed, but having also, and equally, a practical knowledge of how to observe, record, analyze and compare essential facts in relation to wages, supplies, expense accounts, and all else that enters into or affects the economy of production and the cost of the product. There are many good mechanical engineers; — there are also many good " businessmen;"— but the two are rarely combined in one person. But this combination of qualities, together with at least some skill as an accountant, either in one person or more, is essential to the successful management of industrial works, and has its highest effectiveness if united in one person, who is thus qualified to supervise, either personally or through assistants, the operations of all departments of a business, and to subordinate each to the harmonious development of the whole.

Essays in Persuasion (1931), A Short View of Russia (1925)
Context: Leninism is a combination of two things which Europeans have kept for some centuries in different compartments of the soul — religion and business. We are shocked because the religion is new, and contemptuous because the business, being subordinated to the religion instead of the other way round, is highly inefficient.

Source: The Wise Man's Fear

Source: Betrayed

"Systems of Logic Based on Ordinals," section 11: The purpose of ordinal logics (1938), published in Proceedings of the London Mathematical Society, series 2, vol. 45 (1939)
In a footnote to the first sentence, Turing added: "We are leaving out of account that most important faculty which distinguishes topics of interest from others; in fact, we are regarding the function of the mathematician as simply to determine the truth or falsity of propositions."
Context: Mathematical reasoning may be regarded rather schematically as the exercise of a combination of two facilities, which we may call intuition and ingenuity. The activity of the intuition consists in making spontaneous judgements which are not the result of conscious trains of reasoning... The exercise of ingenuity in mathematics consists in aiding the intuition through suitable arrangements of propositions, and perhaps geometrical figures or drawings.