And I never said you said grace originated with man. I simply commented on the verse from Ephesians you quoted.
Because if MAN has to believe and ask (both works / something man does), and in return salvation is granted, then salvation is dependent upon a work man must do.
Yes, of course. And don't forget the preceding verse...
"Wherefore, my beloved, as ye have always obeyed, not as in my presence only, but now much more in my absence, work out your own salvation with fear and trembling." (v. 12)
But being believing / asking and now being obedient are all things MAN does. God doesn't do the believing / asking / obeying. Man does. They are works of man.