A quote from Col Max Radl (Robert Duvall) in the classic 1976 film, "The Eagle has Landed". He was applying the thought to a plan to kidnap Churchill, but it could apply to any walk of life. I tend to agree - if the outcome is desired, it is worth working towards no matter how unlikely success seems.
On another note: Gentlemen may want to watch this film just to see a young Jenny Agutter playing the character of Molly.
A brilliant film.