Toward a psychology of the artist. If there is to be art, if there is to be any aesthetic doing and seeing, one physiological condition is indispensable: frenzy. Frenzy must first have enhanced the excitability of the whole machine; else there is no art. All kinds of frenzy, however diversely conditioned, have the strength to accomplish this" above all, the frenzy of sexual excitement, this most ancient and original form of frenzy. Also the frenzy that follows all great cravings, all strong affects; the frenzy of feasts, contests, feats of daring, victory, all extreme movement; the frenzy of cruelty; the frenzy in destruction; the frenzy under certain meteorological influences, as for example the frenzy of spring; or under the influence of narcotics; and finally the frenzy of will, the frenzy of an overcharged and swollen will. What is essential in such frenzy is the feeling of increased strength and fullness. Out of this feeling one lends to things, one forces them to accept from us, one violates them--this process is called idealizing. Let us get rid of a prejudice here: idealizing does not consist as is commonly held, in subtracting or discounting the petty and inconsequential. What is decisive is rather a tremendous drive to bring out the main features so that the others disappear in the process.
From Twilight of the Idols