Goethe's Faust has inspired a great deal of literature, music, and illustration.
Paul Carus (1852-1919) said Goethe's book had influenced "little less than the Bible."
Walter Kaufmann asserts that "Goethe created a character [i.e. Faust] who was accepted by his people as their ideal prototype."
Many lines and phrases from Goethe's Faust have become part of the German language; see quotes here and here.