How does Irving Stone use imagery in The Agony and the Ecstasy?

Examples of Imagery:

The Topolinos had taught him to work the stone with friendliness, to seek its natural forms, its mountains and valleys, even though it might seem solid; never to grow angry or unsympathetic toward the material.

Marble was the hero of his life; and his fate. Not until this very moment, with his hands tenderly, lovingly on the marble, had he come fully alive.

He was after absolute balance, perfection of line, curve, volume, mass, openness, density, elegance; the profundity of endless space. He aspired to create a work of art that would transcend the age through which he had lived.