The concept of 'tonality' signifies the unified relationship of chords to a central tonic and hence comprises two different assumptions: first, the existence of unifying factors, and second, the existence of, or at least the hypothetical ability to reconstruct, a tonal center.
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Romantische Harmonik und ihre Krise in Wagners Tristan (1920), p.273.Ernst Kurth
"I think the origin of all this clamour for tonality is not so much the need to sense a relationship to the tonic, as a need for familiar chords: let us be frank and say "for the triad"; and I believe I have good reason to say that just so long as a certain kind of music contains enough such triads, it causes no offence, even if in other ways it most violently clashes with the sacred laws of tonality."
Alban Berg
An examination of the harmonic techniques out of their context has all too often led to misleading terminology such as 'static' or 'non-functional' as a description of Debussy's harmonic methods. Viewed as a whole, however, the tonal coherence of his music depends upon a carefully calculated and often dramatic interaction of these various harmonic 'types' with each other and with orthodox diatonic harmony. The result is a tonal language, but one which is fundamentally different in concept from classical tonality. The detailed classifications of harmonic events is no longer possible in Debussy's music where the central tonality of a work emerges only through a constant focusing and re-focusing on harmonic types.
Claude Debussy
First you must have faith in an eternal world independent of you; then you must have faith in your ability to perceive it, and finally you must try to explain it by means of concepts or mathematical constructions. But don't always accept traditional concepts without reexamining them. Even overthrow my relativity theory, if you find a better one. . . . You must believe that the world was created as a unified whole which is comprehensible to man. Of course, it's going to take an infinitely long time to investigate this unified creation. But to me that is the highest and most sacred duty—unifying physics. Simplicity is the criterion of the universe.
Albert Einstein
Consider in how many ways His knowledge is distinguished from ours according to all the teaching of every revealed religion. First, His knowledge is one, and yet embraces many different kinds of objects. Secondly, it is applied to things not in existence. Thirdly, it comprehends the infinite. Fourthly, it remains unchanged, though it comprises the knowledge of changeable things; whilst it seems that the knowledge of a thing that is to come into existence is different from the knowledge of the thing when it has come into existence; because there is the additional knowledge of its transition from a state of potentiality into that of reality. Fifthly, according to the teaching of our Law, God's knowledge of one of two eventualities does not determine it, however certain that knowledge may be concerning the future occurrence of the one eventuality.
Maimonides
Capitalism cannot be reduced to one or a few features, but it does possess one relationship, central to its existence and operation, that constitutes the essence of inequality and ineradicable instability: the wage-labor-capital connection that dwells at the heart of the system.
Herbert Schiller
Kurth, Ernst
Kurti, Nicholas
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