Ken Follett said this quote

“ Jack was too absorbed in his work to hear the bell. He was mesmerized by the challenge of making soft, round shapes of hard rock. The stone had a will of its own, and if he tried to make it do something it did not want to do, it would fight him, and his chisel would slip, or dig in too deeply, spoiling the shapes. But once he had got to know the lump of rock in front of him he could transform it. The more difficult the task, the more fascinated he was. He was beginning to feel that the decorative carving demanded by Tom was too easy. Zigzags, lozenges, dogtooth, spirals and plain roll moldings bored him, and even these leaves were rather stiff and repetitive. He wanted to curve natural-looking foliage, pliable and irregular, and copy the different shapes of real leaves, oak and ash and birch. ”