Why the way that can be walked is not the way?

"Two roads diverged in a wood, and I --

I took the one less travelled by,

and that has made all the difference"

The way that can be walked is different from the way that should be walked. The way that can be walked may or may not be the way that should be walked. (Go ahead, read that part over again) Make the right choices in life and you'll always be walking the right way.