In Romans 7, St. Paul says, "The law is spiritual." What does that mean? If the law were physical, then it could be satisfied by works, but since it is spiritual, no one can satisfy it unless everything he does springs from the depths of the heart. But no one can give such a heart except the Spirit of God, who makes the person be like the law, so that he actually conceives a heartfelt longing for the law and henceforward does everything, not through fear or coercion, but from a free heart.
Martin LutherThe curses of the ungodly are more pleasing to God's ears than the hallelujahs of the pious
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 LutherAll our work in the field, in the garden, in the city, in the home, in struggle, in government-to what does it all amount before God except child's play, by means of which God is pleased to give his gifts in the field, at home, and everywhere? These are the masks of our Lord God, behind which he wants to be hidden and to do all things.
Martin Luther