Keep going by God's grace

I got this idea that as we run the race which is actually a marathon, we are
able to run it or are empowered to run it because of God's grace.
Another athletics picture is of a reciever in football.
You run downfield, open for a pass continually.
I could say that you'll catch that ball by God's grace
and that's true, but my real point is that you keep going downfield,
you keep going out, without seeing the ball coming,
although you still expected the ball to come,
and it may never come, but because of grace, you keep going. You don't keep going
because you know you'll getsomething, but you keep going because the one you're going for is good.