When you put it that way, Don, I think you’re right. At least in the context of that passage. It may be theoretically possible to do a “good enough” job of it without God’s enabling grace, but probably not, in practice, possible for me–but I guess that depends on where the line between “good enough” and “nope–go back and try harder” gets drawn.
Paul did say something to the effect that if you only partially keep the law and don’t keep other parts of it, you’ve broken the whole thing, but I think (if I remember right) that was in Romans and he was pointing out that the Jewish members of the Roman church weren’t especially righteous just because their race had been given the law and they customarily kept what they considered the more important bits.