Perfect fourth

Definition and stakes

Portrait of Ebenezer Prout Ebenezer Prout,  Fugue (1891)

“ In general, if a fugue subject begins with an upward leap of a perfect fifth, or a downward one of a perfect fourth, the first note will be the tonic of the key, and the second the dominant; if, on the other hand, it begins with an upward leap of a fourth, or a downward of a fifth, the first note will be the dominant and the second the tonic. There are occasional exceptions to this rule, as in the following example—
Mozart.
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Source: Wikisource

Portrait of Felix Adler Felix Adler,  Life and destiny

“ And the result of progress is just this, that it makes us more and more able to define the outlines of that shape, to draw sharply and finely the noble lineaments of that face; that it makes us more and more able to see the divine, the perfect man, the only begotten son of all the spirits of the myriads of the generations of men—the man that is to be, the perfection of our imperfection.
The perfect man has never yet appeared on earth. The perfect man is an apparition of light and beauty rising in the boundless infinite, an ideal to be more and more clothed with particularity.
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Source: Gutenberg

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