Introduction To Christianity - pg. 196

This is true; a little bit of good will would really suffice;
but it is the tragedy of mankind that it does not possess the
strength for this very thing. Is Camus right, then, when he
chooses as a symbol of humanity Sisyphus, who keeps
trying to push the stone up the mountain and must continually
see it slip down again? So far as human capacities are
concerned, the Bible is as sober as Camus, but it does not
stop at his scepticism. To the Bible, the limits of human
righteousness, of human power as a whole, become an
indication of the way in which man is thrown back upon
questioning gift of love, a gift which unexpectedly opens
itself to him and thereby open up man himself, and without
which man would remain shut up in all his "righteousness"
and thus unrighteous.