It is not him (a man) that willeth --- it is not a man that can just will salvation on his own...
Nor of him that runneth --- it is not any man's work that saves him...
But God that sheweth mercy --- but it is God that through His mercy shows us the way to salvation.
No "sheweth" means to grant mercy not to show mercy "show us the way to salvation".
eleeō (Key)
1.to have mercy on
At this point, I'm pretty much done with you on this discussion.