“The manner in which mathematical theories are applied does not depend on preconceived ideas; it is a purposeful technique depending on, and changing with, experience.”

Miller Newton (1983). The Teenage Drug Epidemic, El Paso Physician, vol 6, pp. 5-6.
Religious Beliefs

Quoted in Philosophy of Science Vol. 37 (1934), p. 157, and in The Truth of Science : Physical Theories and Reality (1997) by Roger Gerhard Newton, p. 176
Context: What is it that we humans depend on? We depend on our words... Our task is to communicate experience and ideas to others. We must strive continually to extend the scope of our description, but in such a way that our messages do not thereby lose their objective or unambiguous character … We are suspended in language in such a way that we cannot say what is up and what is down. The word "reality" is also a word, a word which we must learn to use correctly.

"The Criminality of the State" in American Mercury (March 1939) http://alumnus.caltech.edu/~ckank/FultonsLair/013/nock/criminality.html
Context: The State's criminality is nothing new and nothing to be wondered at. It began when the first predatory group of men clustered together and formed the State, and it will continue as long as the State exists in the world, because the State is fundamentally an anti-social institution, fundamentally criminal. The idea that the State originated to serve any kind of social purpose is completely unhistorical. It originated in conquest and confiscation—that is to say, in crime. It originated for the purpose of maintaining the division of society into an owning-and-exploiting class and a propertyless dependent class — that is, for a criminal purpose.
No State known to history originated in any other manner, or for any other purpose. Like all predatory or parasitic institutions, its first instinct is that of self-preservation. All its enterprises are directed first towards preserving its own life, and, second, towards increasing its own power and enlarging the scope of its own activity. For the sake of this it will, and regularly does, commit any crime which circumstances make expedient.

The Evolution of Physics (1938) (co-written with Leopold Infeld)
1930s

Objecting to the placing of observables at the heart of the new quantum mechanics, during Heisenberg's 1926 lecture at Berlin; related by Heisenberg, quoted in Unification of Fundamental Forces (1990) by Abdus Salam ISBN 0521371406
1920s

Source: undated quotes, Tàpies, Werke auf Papier 1943 – 2003,' (2004), p. 30 : About the ambivalence in his own work.

Songs of the Soul (1971)
Context: Science depends on outer experiment. Spirituality depends on inner searching and seeking. A scientist discovers the power that very often threatens even his own life. A spiritual seeker discovers the power that guides and moulds his life into a life of divine fulfilment.

Life of Vivekananda (1944)
Context: The true Vedantic spirit does not start out with a system of preconceived ideas. It possesses absolute liberty and unrivalled courage among religions with regard to the facts to be observed and the diverse hypotheses it has laid down for their coordination. Never having been hampered by a priestly order, each man has been entirely free to search wherever he pleased for the spiritual explanation of the spectacle of the universe.

On geomatric motion. A History of the Work Concept: From Physics to Economics, by Agamenon Oliveira, p. 154.