"Walking, like prose, has a definite aim. [...]movements in walking...
are abolished and, as it were, absorbed by the accomplishment of the 
act, by the attainment of the goal. 
The dance is quite another matter. If it pursues an object, it is only 
an ideal object, a state, an enchantment, the phantom of a flower, 
a smile--which forms at last on the face of the one who summoned it 
from empty space.
[...]however different the dance may be from walking and utilitarian 
movement, it uses the same organs, the same bones, the same muscles, 
only differently co-ordinated and aroused.
This is why one should guard against reasoning about poetry as one 
does about prose.
-Paul Valery