“Naturally, it is necessary to redefine what is meant.”
The close of his Nobel lecture: "The Statistical Interpretations of Quantum Mechanics" (11 December 1954) http://nobelprize.org/nobel_prizes/physics/laureates/1954/born-lecture.html
Context: Can we call something with which the concepts of position and motion cannot be associated in the usual way, a thing, or a particle? And if not, what is the reality which our theory has been invented to describe?
The answer to this is no longer physics, but philosophy. … Here I will only say that I am emphatically in favour of the retention of the particle idea. Naturally, it is necessary to redefine what is meant. For this, well-developed concepts are available which appear in mathematics under the name of invariants in transformations. Every object that we perceive appears in innumerable aspects. The concept of the object is the invariant of all these aspects. From this point of view, the present universally used system of concepts in which particles and waves appear simultaneously, can be completely justified. The latest research on nuclei and elementary particles has led us, however, to limits beyond which this system of concepts itself does not appear to suffice. The lesson to be learned from what I have told of the origin of quantum mechanics is that probable refinements of mathematical methods will not suffice to produce a satisfactory theory, but that somewhere in our doctrine is hidden a concept, unjustified by experience, which we must eliminate to open up the road.
Help us to complete the source, original and additional information
Max Born 19
physicist 1882–1970Related quotes

“What is meant by its nature for the highest and the best, spreads among the lowly people.”
Source: Franz Kafka: A Biography (1960), p. 74
“But it is the nature of life that no emotion is meant to last forever…”
Source: The Wild (1995), p. 42

“Luxury is the opposite of the naturally necessary.”
Grundrisse (1857-1858)
Source: Notebook V, The Chapter on Capital, p. 448.
Source: The Ideological Origins of the American Revolution (1967), Chapter III, POWER AND LIBERTY A THEORY OF POLITICS, p. 57.

The American Mercury (May 1926)
1920s
Context: It is the natural tendency of the ignorant to believe what is not true. In order to overcome that tendency it is not sufficient to exhibit the true; it is also necessary to expose and denounce the false. To admit that the false has any standing in court, that it ought to be handled gently because millions of morons cherish it and thousands of quacks make their livings propagating it—to admit this, as the more fatuous of the reconcilers of science and religion inevitably do, is to abandon a just cause to its enemies, cravenly and without excuse. It is, of course, quite true that there is a region in which science and religion do not conflict. That is the region of the unknowable.

“People are meant to go through life two by two. 'Tain't natural to be lonesome.”
"Mrs. Gibbs"
Source: Our Town (1938)