Everything seems straightforward enough, so the skipper starts going up and on the first floor the sign reads, "All the crew on this floor are beginners." The skipper laughs, and without hesitation moves on to the next floor. The sign on the second floor reads, "All the crew here are experienced, smart but weak."
Still, this isn't good enough, so the Skipper continues on up. He reaches the third floor and the sign reads, "All the crew here are experienced, smart and strong." He still wants to do better, and so, knowing there are still two floors left, he keeps going. On the fourth floor, the sign is perfect, "All the crew here are experienced, smart, strong and former America's Cup Champions." The Skipper get excited and is about to go in when he realizes that there is still one floor left.
Wondering what he is missing, he heads up to the fifth floor. There he finds a sign that reads, "There are no crew here. This floor was built only to prove that there is no way to please a Skipper!"
Worrying won't stop the bad stuff from happening. It just keeps you from enjoying the good stuff.
Live Long and Prosper...