Final answer:
Wassily Kandinsky is the artist who believed that abstract and nonrepresentational art could provide spiritual nourishment for the modern world.
Step-by-step explanation:
The artist most notable for hoping that abstract and nonrepresentational art could provide spiritual nourishment for the modern world is Wassily Kandinsky. In his book 'Concerning the Spiritual in Art' published in 1912, Kandinsky explored the connection between art and spirituality. He believed that abstract art had the power to evoke emotions and spiritual experiences beyond the physical world.