This letter [to the Romans] is truly the most important piece in the New Testament. It is purest Gospel. It is well worth a Christian's while not only to memorize it word for word but also to occupy himself with it daily, as though it were the daily bread of the soul. It is impossible to read or to meditate on this letter too much or too well. The more one deals with it, the more precious it becomes, and the better it tastes.
Martin LutherWhenever the true message of the cross is abolished, the anger of hypocrites and heretics ceases.. and all things are in peace. This is a sure token that the devil is guarding the entry to the house, and that the PURE doctrine of God's Word has been taken away. The Church then, is in the BEST state when Satan assaileth it on every sideboth with subtle sleights, and outright violence. And likewise, it is in the WORST state when it is most at peace!
Martin LutherThere are three conversions necessary (for the Christian life): the conversion of the heart, the mind, and the purse.
Martin Luther