“Whenever you make a figure of a man or of some graceful animal remember to avoid making it seem wooden; that is it should move with counterpoise and balance in such a way as not to seem a block of wood.”
The Notebooks of Leonardo Da Vinci (1938), XXIX Precepts of the Painter
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Leonardo Da Vinci 363
Italian Renaissance polymath 1452–1519Related quotes
As quoted by David Milner, "Kenpachiro Satsuma Interview I" http://www.davmil.org/www.kaijuconversations.com/satsum.htm, Kaiju Conversations (December 1993)

“He moves in darkness as it seems to me,
Not of woods only and the shade of trees.”
Mending Wall (1914)
Context: He moves in darkness as it seems to me,
Not of woods only and the shade of trees.
He will not go behind his father’s saying,
And he likes having thought of it so well
He says again, “Good fences make good neighbours.”

explaining his way of imagination
Karel Appel defines his painting', interview 1968

Music, Mind, and Meaning (1981)
Context: If explaining minds seems harder than explaining songs, we should remember that sometimes enlarging problems makes them simpler! The theory of the roots of equations seemed hard for centuries within its little world of real numbers, but it suddenly seemed simple once Gauss exposed the larger world of so-called complex numbers. Similarly, music should make more sense once seen through listeners' minds.
Source: Quiet, Please: Dispatches From A Public Librarian