Something odd about this one.

"I count him braver who overcomes his desires than him who conquers his enemies;
for the hardest victory is the victory over self." ~ Aristotle

True, but if you don't overcome your enemies, you won't be around to conquer anything.

Surely there are more than enough fly fishing related quotes to use. Given the thread about 'Catching', how about:

"Bragging may not bring happiness, but no man having caught a large fish goes home through an alley" Anonymous

Allan