The quote "You miss 100% of the shots you don't take" is widely attributed to Wayne Gretzky, the legendary Canadian ice hockey player. He originally said it around 1990, explaining that it was a response to people telling him to take more shots in hockey. Gretzky credits the idea behind the quote to his father, Walter Gretzky, who advised him that if he didn't take the shots, he wouldn't score. The quote encourages taking chances and action, as missing a shot is better than not attempting at all because if you don't try, you have zero chance of success.
In popular culture, this quote was notably referenced by Michael Scott, a character in the TV show "The Office," but its origin is from Wayne Gretzky.