Rudolf Carnap (1935) Philosophy and Logical Syntax. p. 9-10
“The realization of the pathetic frailty of the knowledge or beliefs on which our life depends thus leads not to despair but to open-eyed courage. But it also points to a most intimate connection between scientific method and liberal civilization. Science is not, as is popularly conceived, a new set of dogmas taught by a newer and better set of priests called scientists. It is rather a method which is based on a critical attitude to all plausible and self-evident propositions. It seeks not to reject them, but to find out what evidence there is to support them rather than their possible alternatives. This open eye for possible alternatives, each to receive the same logical treatment before we can determine which is the better grounded, is the essence of liberalism in art, morals, and politics.... Like science, liberalism insists on a critical examination of the content of all our beliefs, principles, or initial hypotheses and on subjecting them to a continuous process of verification so that they will be progressively better founded in experience and reason.”
Language in Thought and Action, p. 271, (1939), S.I. Hayakawa
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Morris Raphael Cohen 5
American philosopher 1880–1947Related quotes

Homilies of Science p. 15
Homilies of Science 1892
Context: Some imagine that science is limited to the lower sorts of natural facts only. Religious and moral facts have been too little heeded by our scientists. Thus people came to think that science and religion move in two different spheres. That is not so. The facts of our soul-life must be investigated and stated with scientific accuracy, and our clergy should be taught to purify religion with the criticism of scientific methods. They need not fear for their religious ideals. So far as they are true, and their moral kernel is true, they will not suffer in the crucible of science. Religion will not lose one iota of its grandeur, if it is based upon a scientific foundation; all that it will lose is the errors that are connected with religion and the sooner they are lost the better for us.

Quoted from his book “In Nehru and His Vision 1999" in: K.K. Sinha, Social And Cultural Ethos Of India http://books.google.co.in/books?id=Jb-fO2R1CQUC&pg=PA183, Atlantic Publishers & Dist, 1 January 2008, p. 183

1940s, Religion and Science: Irreconcilable? (1948)
Context: Science, in the immediate, produces knowledge and, indirectly, means of action. It leads to methodical action if definite goals are set up in advance. For the function of setting up goals and passing statements of value transcends its domain. While it is true that science, to the extent of its grasp of causative connections, may reach important conclusions as to the compatibility and incompatibility of goals and evaluations, the independent and fundamental definitions regarding goals and values remain beyond science's reach.
As regards religion, on the other hand, one is generally agreed that it deals with goals and evaluations and, in general, with the emotional foundation of human thinking and acting, as far as these are not predetermined by the inalterable hereditary disposition of the human species. Religion is concerned with man's attitude toward nature at large, with the establishing of ideals for the individual and communal life, and with mutual human relationship. These ideals religion attempts to attain by exerting an educational influence on tradition and through the development and promulgation of certain easily accessible thoughts and narratives (epics and myths) which are apt to influence evaluation and action along the lines of the accepted ideals.
Kenneth Boulding (1958, p. 95) as cited in: Edward Stamp, Michael J. Mumford, Ken V. Peasnell (1993) Philosophical Perspectives on Accounting. p. 147
1950s
Source: Just a Theory: Exploring the Nature of Science (2005), Chapter 3, “Words Scientists Don’t Use: At Least Not the Way You Do” (pp. 51-52)