Persistence and possibility
In order to use the slicing blade on my Cuisinart, I have to attach it to a little stalk first.
I used to have an old model and a newer one too, and of course, they had different blades and different stalks. If I was having trouble hooking the two pieces together (which was every time), after a few seconds I would come to the conclusion that I had the wrong stalk... and go back to the drawer and start over.
Ever since the old one broke, though, I find that I'm far more persistent in fitting the two pieces together. Obviously, I say to myself, they have to fit together. It's certainly possible, so I persist.
That's the benefit of having a hero, a case study, a role model for what came before. The fact that it's been done before makes just about any task more amenable to persistence.
And it also means that doing something that's never been done before is even more valuable than you'd guess, because your peers and competitors likely gave up long before you did.