For it is a horrible blasphemy to imagine that there is any work by which you should presume to pacify God, since you see that there is nothing which is able to pacify Him but this inestimable price, even the death and the blood of the Son of God, one drop of which is more precious than the whole world.
Martin LutherWhilst a man is persuaded that he has it in his power to contribute anything, be it ever so little, to his salvation, he remains in carnal self-confidence; he is not a self-despairer, and therefore is not duly humbled before God, he believes he may lend a helping hand in his salvation, but on the contrary, whoever is truly convinced that the whole work depends singly on the will of God, such a person renounces his own will and strength; he waits and prays for the operation of God, nor waits and prays in vain
Martin Luther