Luther on "Enemies of the Cross of Christ"

Brethren, join in imitating me, and mark those who so live as you have an example in us. For many, of whom I have often told you and now tell you even with tears, live as enemies of the cross of Christ. 

--Their end is destruction, 

--their god is the belly, 

--and they glory in their shame, 

--with minds set on earthly things. 

But our commonwealth is in heaven, and from it we await a Savior, the Lord Jesus Christ, who will change our lowly body to be like His glorious body, by the power which enables Him even to subject all things to Himself. Philippians 3:17-21

"Of the sensual papistical dolts at Rome, cardinals, bishops, priests

and the like, it is not necessary to speak here. Their works are manifest. 

All honorable secular authorities must confess they are simply abandoned knaves, living shameless lives of open scandal, avarice, arrogance, unchastity, vanity, robbery and wickedness of every kind. Not only are they guilty of such living, but shamelessly endeavor to defend their conduct. They must, then, be regarded enemies of Christ and of all honesty and virtue. 

Hence every respectable man is justly antagonistic toward them. 

But, as before said, Paul is not here referring to this class, but to eminent, godly individuals, whose lives are beyond reproach. These very ones, when Christians are encountered, are hostile and heinous enough to be able to forget all their own faults in the sight of God, and to magnify to huge beams the motes we Christians have. In fact, they must style the Gospel heresy and satanic doctrine for the purpose of exalting their own holiness and zeal for God.
The apostle makes his accusation yet more galling with the words “whose god is their belly.” Thus you hear how human righteousness, even at its best, extends no higher than to service of the sensual appetites." 

Martin Luther