“The is that Leonardo was converted to remake nature...” p. 148
“The space occupied by forms was, after all, a ‘continuous quantity’. The resulting graphite tangle of chalk and ink, in which even he might begin to lose orientation, could then be given done selective plastic definition by the addition of sepia wash... the most promising of the myriad alternatives could be pressed through to the other side...” p. 173
"St. James, full of youthful nervous sensibility, starts back, withdrawing his shoulder and neck at the same time as inclining his head forward to register that the shocking words have been said." p. 184
"'The good painter has to paint two principle things, that is to say man and the intention of his mind...the latter has to be represented through gestures and movements of the limbs-which can be learned from the dumb, who exhibit gestures better than any other kind of man...'" p. 186
"The result is a peculiar form of naturalism-a kind of 'hypernaturalism in which things look incredibly 'real' on their own terms without looking quite as they do in nature" p. 191
"As the light changes, even by a fraction otherwise imperceptible to our naked eyes, and as our viewing position changes a little, the image 'breathes'....Leonardo does it by filtering the white brilliance of the panel's priming through enticing layers of warm glaze, so thin as to tax even modern scientific analysis. He does it by pitching soft ed against a soft green of equal tonal value, opaque pale blue against translucent browns, definite line against elusive roundness, and by teasing us with things that invite us to see them as defined when they are veiled in ambiguity." p. 249