By virtue of his pictorial-dynamic way of regarding nature, Ruskin was quite clear that the scientists' one-sided seeking after external forces and the mathematically calculable interplay between them can never lead to a comprehension of life in nature. For in such a search man loses sight of the real signature of life: form as a dynamic element. Accordingly, in his Ethics of the Dust, Ruskin does not answer the question: 'What is Life?' with a scientific explanation, but with the laconic injunction: 'Always stand by Form against Force.' This he later enlarges pictorially in the words: 'Discern the moulding hand of the potter commanding the clay from the merely beating foot as it turns the wheel.' (Lect. X.)