Is that what Karaya belongs to? Those priests are some pretty weak sticks to hold themself so highly 
Maybe.
Now, as for Ranger school, I'm going to assume you're in your 20's and offer you something from an old(er)person who thinks he understands a thing or two (and I'm sure you'll tell me if I'm crazy).
It's like this: One day, you'll be old and sitting there, thinking about your life. You'll think about things you've done where you hung it all out there, maybe pushed it too far or got in over your head. You'll be smiling when you think of those episodes. Then you'll think of the cases where you DIDN'T do that - and you won't be smiling.
So, - my opinion - if it's up to you, you've got to do this. Even failure, if the attempt is wholehearted, is no shame.
Failing to attempt, though, is corrosive to the integrity of that type of cat.
That's my read, anyway.