John 10 (xxviii)

Because of this, every Christian - as long as he has accepted the Gospel in faith - should truly rejoice that he has Christ as his Shepherd. He must not allow his sins to lead him astray once he has taken hold of the Gospel: Christ, who is now leading him, will take care of everything. The Devil will of course tempt him with this vice and that vice, with adultery, fornication, theft, envy, hatred, anger and whatever other sins there may be. But this is no longer a cause for distress; for the Christian has a strong and powerful King to defend him. Things may get hard for you, things may go wrong, and for this reason it will be necessary to keep asking God for help. Other people may also be praying for you, so that your spirit is strong enough and your heart bold enough for you to resist the Devil. But this is certain: you will not be abandoned! Christ will surely save you; but do not fall out of His Kingdom!

The complete Luther - "A Meditation for Each Day of the Year" is available as a biligual (English and German) BREVIARY published by Wartburg Verlag Weimar. It can be purchased in English, world-wide from most internet book shops.