"God never promised to save anybody for his religious observance of ceremonies and ordinances. Those who rely upon such things do serve a god, but it is their own invention of a god, and not the true God... we are justified not by works, sacrifices, or ceremonies, but by Christ alone...
I remember how Doctor Staupitz used to say to me: "I have promised God a thousand times that I would become a better man, but I never kept my promise... [A] saint is not one who is made of wood and never feels any lusts or desires of the flesh. A true saint confesses his righteousness and prays that his sins may be forgiven... we know now from the Scriptures who the true saints are. Not those who live a single life, or make a fetish of days, meats, clothes, and such things. The true saints are those who believe that they are justified by the death of Christ"
Martin Luther, Commentary on Galatians