...just hold to the one that will work.
"Forget all the reasons why it won't work, and believe in that one reason that will work."- Unknown.
There is no need to worry about it not working, just believe that there is a reason it will work out of all the reasons why it won't work.
You have only one reason to make it work and that is, having a belief system that no matter what happens, it will surely work because you want it to.