Lo, in this Commandment again you see briefly that faith must be the master-workman in this work also, so that without it no one has courage to do this work: so entirely are all works comprised in faith, as has now been often said. Therefore, apart from faith all works are dead, however good the form and name they bear. For as no one does the work of this Commandment except he be firm and fearless in the confidence of divine favor; so also he does no work of any other Commandment without the same faith: thus every one may easily by this Commandment test and weigh himself whether he be a Christian and truly believe in Christ, and thus whether he is doing good works or no. Now we see how the Almighty God has not only set our Lord Jesus Christ before us that we should believe in Him with such confidence, but also holds before us in Him an example of this same confidence and of such good works, to the end that we should believe in Him, follow Him and abide in Him forever; as He says, John xiv: "I am the Way, the Truth and the Life,"--the Way, in which we follow Him; the Truth, that we believe in Him; the Life, that we live in Him forever.
From all this it is now manifest that all other works, which are not commanded, are perilous and easily known: such as building churches, beautifying them, making pilgrimages, and all that is written at so great length in the Canon Law and has misled and burdened the world and ruined it, made uneasy consciences, silenced and weakened faith, and has not said how a man, although he neglect all else, has enough to do with all his powers to keep the Commandments of God, and can never do all the good works which he is commanded to do; why then does he seek others, which are neither necessary nor commanded, and neglect those that are necessary and commanded?
The last two Commandments, which forbid evil desires of the body for pleasure and for temporal goods, are clear in themselves; these evil desires do no harm to our neighbor, and yet they continue unto the grave, and the strife in us against them endures unto death; therefore these two Commandments are drawn together by St. Paul into one, Romans vii, and are set as a goal unto which we do not attain, and only in our thoughts reach after until death. For no one has ever been so holy that he felt in himself no evil inclination, especially when occasion and temptation were offered. For original sin is born in us by nature, and may be checked, but not entirely uprooted, except through the death of the body; which for this reason is profitable and a thing to be desired. To this may God help us. Amen.
End of Project Gutenberg's A Treatise on Good Works, by Dr. Martin Luther