Their element is to attack, ...

Their element is to attack, to track, to hunt, and to destroy the enemy. Only in this way can the eager and skillful fighter pilot display his ability. Tie him to a narrow and confined task, rob him of his initiative, and you take away from him the best and most valuable qualities he posses: aggressive spirit, joy of action, and the passion of the hunter.
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 Adolf Galland

Quotes from the same author

Never abandon the possibility of attack. Attack even from a position of inferiority, to disrupt the enemy's plans. This often results in improving one's own position.
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 Adolf Galland
To use a fighter as a fighter-bomber when the strength of the fighter arm is inadequate to achieve air superiority is putting the cart before the horse.
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 Adolf Galland
Superior technical achievements - used correctly both strategically and tactically - can beat any quantity numerically many times stronger yet technically inferior.
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 Adolf Galland
I had to inspect all fighter units in Russia, Africa, Sicily, France, and Norway. I had to be everywhere.
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 Adolf Galland