“Do not allow ANYTHING to be an impassable obstacle. Encounter but always continue.” -Cavario H.
There is nothing that is universally insurmountable, no matter how “impossible” it may seem, someone, at some point, some place has overcome it. When you operate within the parameters of your true nature, then, even when you venture into what is yet unknown to you, you will encounter, endure, and ultimately continue. You will be able to do so because you are intent upon doing so, and you will make a way. The only way that anything can impede your forward progression is if you decide that the obstruction (be it man or metal) possesses the power to do so.