"Success is always achievable, when failure is not an option"

Failure is Not an Option is a phrase associated with Gene Kranz and the Apollo 13 Moon landing mission. Although Kranz is often attributed with having spoken those words during the mission, he did not. The origin of the phrase is from the preparation for the 1995 film Apollo 13[1] according to FDO Flight Controller Jerry Bostick:

"In preparation for the movie, the script writers, Al Reinert and Bill Broyles, came down to Clear Lake to interview me on "What are the people in Mission Control really like?" One of their questions was "Weren't there times when everybody, or at least a few people, just panicked?" My answer was "No, when bad things happened, we just calmly laid out all the options, and failure was not one of them."