When I heard it first time honestly, I have questioned myself like "what the f*ck does it mean, Crossing the Chasm?"
The Chasm is the point where you have to jump on the most closest time through success.
I have learned it after experiencing the situation like all others.
It requires sacrifices, determination, patience and time.
Myth is true, only the people who can pass it, can be succeed.
The exam is about "how hard you can get hit and keep moving forward".
But of course, we can not climb success stairs with our hands in pocket.
When you reach that point, remember.
"How far you can go?"
Results are hidden on this answer about if you can cross it or not.
P.S: If you do not believe on yourself, nobody else will.