Grace is not against good works! It simply does not bless on the basis of good works. We receive blessing from God based solely on the merits of His Son--blessings freely given to us in Christ and nowhere else. The completeness that is in Christ mean deliverance from trying to 'be good' and 'do right' in order to be accepted by God.
The law demands good works and uses its terror--rejection, shame, fear of punishment, unanswered prayer, personal tragedy, etc.--as motivation. Here performance is a necessity to secure the blessings and avoid the curses. Grace, on the other hand, allows us to serve on a different basis--not from fear but on the basis of love and gratitude, from appreciation and gladness for blessings freely given and freely received.
It occurred to me that if I could invent a machine - a gun - which could by its rapidity of fire, enable one man to do as much battle duty as a hundred, that it would, to a large extent supersede the necessity of large armies, and consequently, exposure to battle and disease [would] be greatly diminished.
