It's always the Leap.

The leap of faith. I remember many times it was used. It is somewhat allegoric, but just might be a bit cliche. But still. It is well allegorized.

But maybe it isn't always a leap. (Don't just go screaming Sacrilege. I have a point.) Maybe it is more like a creepy bridge without handles. You can see the other side and the path. You can do it. That is, unless you're made of Uranium: The bridge snaps under your weight, and as you hit the ground you detonate in an epic reaction that eliminates all other sides of your journey! Translation: It fails meagerly and life continues undramatized.

Yeah, the leap makes sense, but that involves plunging headfirst into the unknown. The shaky bridge and the epic fall make a little more sense. Especially since all you would be falling into is water. But to you that water is full of radioactive piranhas. Which actually fuse together to become the loch ness monster. Even though you could see the bottom and have been drinking that same water.

Maybe there is a better allegory. One with less hypothetical danger. Like a mountain trail. But you need to have your Mission Trip Machete, because, you know, a Mountain Lion might try to maul you or something.