>The more we study it, the more it appears that people do not usually miss because they are bad shots, they miss because they are not paying attention. Concentration is what puts hits on the target. Distraction is what causes misses. The effective marksman learns to blot out all aspects of the situation but his sight picture and his trigger press. He must wear “psychological blinders” until after his target is down. This should be obvious, but apparently it is not.
— LTC John Dean “Jeff” Cooper, USMC (retired)
10 May 1920 – 25 September 2006