'"He is two feet longer than the skiff," the old man said. The line was going out fast but steadily and the fish was not panicked. The old man was trying with both hands to keep the line just inside of breaking strength. He knew that if he could not slow the fish with a steady pressure the fish could take out all the line and break it.
He is a great fish and I must convince him, he thought. I must never let him learn his strength nor what he could do if he made his run. If I were him I would put in everything now and go until something broke. But, thank God, they are not as intelligent as we who kill them; although they are more noble and more able.'
from 'The Old Man and the Sea'
by Ernest Hemingway