Plot, or evolution, is life responding to environment; and not only is this response always in terms of conflict, but the really great struggle, the epic struggle of creation, is the inner fight of the individual whereby the soul builds up character.
~William Wallace Cook
Plot is people. Human emotions and desires founded on the realities of life, working at cross purposes, getting hotter and fiercer as they strike against each other until finally there’s an explosion—that’s Plot.
~Leigh Brackett