No plasticity exists in the Quran. This book is believed by Muslims to be the verbatim words of God. How can you change the word of God? Other religions are living. They are changing and evolving. Islam is fossilized. It allows no change. It can't be reformed.
Take hold of objects by their centres, not by their lines of contour... The contour accentuated uniformly and beyond proportion, destroys plasticity, bringing forward those parts of an object which are always most distant from the eye - namely its outlines.
We need more urgently than architectural utopias, ingenious traffic disposal systems, or ecological programmes to comprehend the nature of citizenship, to make serious imaginative assessment of that special relationship between the self and the city; its unique plasticity, its privacy and freedom.
The artist does not see both eyes alike. There is always 'the eye' and the other eye... It adds life and plasticity to the drawing if the eye in the light is darker than the one in the shadow. It gives the head vividness.