Camera Obscura:

The vortex is the point of maximum energy.
         It represents, in mechanics, the greatest efficiency.
         We use the words “greatest efficiency” in the precise sense—as they would be used in a text book of MECHANICS.
         You may think of man as that toward which perception moves. You may think of him as the TOY of circumstance, as the plastic substance RECEIVING impressions.
         OR you may think of him as DIRECTING a certain fluid force against circumstance, as CONCEIVING instead of merely observing and reflecting.

Ezra Pound -  Vortex 1914 -  Vortex by Ezra Pound