“Arts may ply fantastic anatomy but nature is always herself in her wildest moods of extravagence.”

L’amour est le plus joli larcin que la Société ait su faire à la Nature; mais la maternité, n’est-ce pas la Nature dans sa joie? Un sourire a séché mes larmes.
Part I, ch. XXVIII.
Letters of Two Brides (1841-1842)

Source: Art, 1912, Preface, p. 7-8
Context: Art is contemplation. It is the pleasure of the mind which searches into nature and which there divines the spirit by which Nature herself is animated. It is the joy of the intellect which sees clearly into the Universe and which recreates it, with conscientious vision. Art is the most sublime mission of man, since it is the expression of thought seeking to understand the world and to make it understood.

Part 4, Section 5
A Treatise of Human Nature (1739-40), Book 1: Of the understanding

Variant: But then anyone who's worth anything reads just what he likes, as the mood takes him, and with extravagant enthusiasm.
Source: Jacob's Room

Source: The Confessions of Aleister Crowley (1929), Ch. 7.
Context: As long as sexual relations are complicated by religious, social and financial considerations, so long will they cause all kinds of cowardly, dishonourable and disgusting behaviour. When war conditions imposed artificial restraint on the sister appetite of hunger, decent citizens began to develop all kinds of loathsome trickery. Men and women will never behave worthily as long as current morality interferes with the legitimate satisfaction of physiological needs. Nature always avenges herself on those who insult her. The individual is not to blame for the crime and insanity which are the explosions consequent on the clogging of the safety valve. The fault lies with the engineer. At the present moment, society is blowing up in larger or smaller spots all over the world, because it has failed to develop a system by which all its members can be adequately nourished without conflict and the waste products eliminated without discomfort.

Frank Baude in Mot strömmen, pg 124. Translated from Swedish.

“While it is in the nature of Law,” Alisaard explained, “to be forever fixed. The Balance is there to ensure that neither Law nor Chaos ever gain complete ascendancy, for the one offers sterility while the other offers only sensation.”
Book 3, Chapter 1 (p. 626)
Erekosë, The Dragon in the Sword (1986)

Sam Harris, Drugs and the Meaning of Life http://www.samharris.org/blog/item/drugs-and-the-meaning-of-life/ (5 July 2011)
2010s
Context: I have visited both extremes on the psychedelic continuum. The positive experiences were more sublime than I could have ever imagined or than I can now faithfully recall. These chemicals disclose layers of beauty that art is powerless to capture and for which the beauty of Nature herself is a mere simulacrum. It is one thing to be awestruck by the sight of a giant redwood and to be amazed at the details of its history and underlying biology. It is quite another to spend an apparent eternity in egoless communion with it. Positive psychedelic experiences often reveal how wondrously at ease in the universe a human being can be—and for most of us, normal waking consciousness does not offer so much as a glimmer of these deeper possibilities... But as the peaks are high, the valleys are deep. My “bad trips” were, without question, the most harrowing hours I have ever suffered—and they make the notion of hell, as a metaphor if not a destination, seem perfectly apt.

Writing on Charles Dickens, in "In Defence of an Obsolete Author" in William and Mary College Monthly (November 1897), VII, p. 3-4