“Ever since prehistoric antiquity one field of study after another has crossed the divide between what the historian might call its prehistory as a science and its history proper. These transitions to maturity have seldom been so sudden or so unequivocal as my necessarily schematic discussion may have implied. But neither have they been historically gradual, coextensive, that is to say, with the entire development of the fields within which they occurred.”

Quote of John Cage, in: 'The Future of Music: Credo' (1937); SILENCE; lectures and writings by Cage, John', Publisher Middletown, Conn. Wesleyan University Press, June 1961, CREDO/3
1930s

Source: "Does the history of psychology have a future?." 1994, p. 472

remarks (2 May 1956) at a Caltech YMCA lunch forum http://calteches.library.caltech.edu/49/2/Religion.htm <br class="br">Context: In this age of specialization men who thoroughly know one field are often incompetent to discuss another. The great problems of the relations between one and another aspect of human activity have for this reason been discussed less and less in public. When we look at the past great debates on these subjects we feel jealous of those times, for we should have liked the excitement of such argument. The old problems, such as the relation of science and religion, are still with us, and I believe present as difficult dilemmas as ever, but they are not often publicly discussed because of the limitations of specialization.

Source: Constructing the subject: Historical origins of psychological research. 1994, p. vii; Preface.

Source: 1930s, "Empirical Sociology" (1931), p. 319; Lead paragraph

The Architecture of Theories (1891)
Context: Of the fifty or hundred systems of philosophy that have been advanced at different times of the world's history, perhaps the larger number have been, not so much results of historical evolution, as happy thoughts which have accidently occurred to their authors. An idea which has been found interesting and fruitful has been adopted, developed, and forced to yield explanations of all sorts of phenomena. … The remaining systems of philosophy have been of the nature of reforms, sometimes amounting to radical revolutions, suggested by certain difficulties which have been found to beset systems previouslv in vogue; and such ought certainly to be in large part the motive of any new theory. … When a man is about to build a house, what a power of thinking he has to do, before he can safely break ground! With what pains he has to excogitate the precise wants that are to be supplied. What a study to ascertain the most available and suitable materials, to determine the mode of construction to which those materials are best adapted, and to answer a hundred such questions! Now without riding the metaphor too far, I think we may safely say that the studies preliminary to the construction of a great theory should be at least as deliberate and thorough as those that are preliminary to the building of a dwelling-house.

Pt. I, The Unknowable; Ch. IV, The Relativity of All Knowledge
First Principles (1862)

Source: The Political Economy of International Relations (1987), Chapter Nine, transformation Of The Global Economy, p. 351

Introductory
The Grammar of Science (1900)