“And he turned his mind to unknown arts.”

Source: The Forgotten Beasts of Eld

Note to the "Criticism" section
The Portable Matthew Arnold (Viking Press, 1949)

poem before 1973; in a exh. cat., ed. Suzanne Delehanty (1973; repr., Philadelphia: The Falcon Press, 1976), p. 40
1970's

Treatise on Demonstration of Problems of Algebra (1070).
Context: By the help of God and with His precious assistance, I say that Algebra is a scientific art. The objects with which it deals are absolute numbers and measurable quantities which, though themselves unknown, are related to "things" which are known, whereby the determination of the unknown quantities is possible. Such a thing is either a quantity or a unique relation, which is only determined by careful examination. What one searches for in the algebraic art are the relations which lead from the known to the unknown, to discover which is the object of Algebra as stated above. The perfection of this art consists in knowledge of the scientific method by which one determines numerical and geometric unknowns.

A Handbook for Young Painters

Source: 1840s, Two Ethical-Religious Minor Essays (1849), P. 108

Misattributed to Chateaubriand on the internet and even some recently published books, this statement actually originated with L. P. Jacks in Education through Recreation (1932)
Misattributed

As quoted in "Space is still the place" by W. Kim Heron in Metro Times (6 June 2007) http://www.metrotimes.com/editorial/story.asp?id=10582
Context: People have a lot more of the unknown than the known in their minds. The unknown is great; it's like the darkness. Nobody made that. It just happens. Light and all that — someone made that; it's written that they did. But nobody made the darkness. My music is about dark tradition. Dark tradition means a lot more about than black tradition. There's a lot of division in what they call black. I'm not into division. I'm into coordination, discipline and tradition.

Losing Face
Grooks