Perspective should be learned - and then forgotten. The residue - a sensitivity to perspective - helps perception, varying with each individual and d…

- Nathan Goldstein

The local-tone is the intrinsic value of a thing - excluding any effects of light. The local-tone of a common pearl is very nearly white; that of a l…

- Nathan Goldstein

Value, whether the result of massed lines, broad strokes, or washes, is the necessary and only tool for modelling form with light.

- Nathan Goldstein

The inherent lightness or darkness of a form - its local-tone - is a given quality of all forms. It is affected by, but separate from, the light and …

- Nathan Goldstein

Value gives the artist the means of showing subtle changes in a form's surface-state, and it helps clarify the relative distance between forms.

- Nathan Goldstein