Behold, my dear friends, it is not enough that we are baptized in the name of Christ, that we are called brethren or sisters of Christ, and bear the name of Christians. O no, all this cannot save; for John says: “Little children, let no man deceive you: he that doeth righteousness is righteous. He that committeth sin is of the devil. In this the children of God are manifest, and the children of the devil.” John 3:7,8,10. And Christ says: “Ye are my friends, if ye do whatsoever I command you.” John 15:14. Again: “If a man love me, he will keep my words and commandments; and he that hath my commandments and keepeth them, he it is that loveth me.” John 14:23,21. For John says: “He that saith he loveth God, and keepeth not his commandments, is a liar, and the truth is not in him.” 1 John 2:4. And you know that a liar has no part in the kingdom of God. Rev. 21:8. Therefore, be not Christians with the mouth, nor with the tongue, but in deed and in truth. 1 John 3:18. For it is utterly in vain to bear the name of Christ, so long as we are not conformed to him in word, work and thought; for Paul says: “Whom he did foreknow, he also did predestinate to be conformed to the image of his Son, that he might be the first-born among many brethren.” Rom. 8:29. If he then has called and predestinated you, use diligence that you become conformed to him, so that you may be found true Christians in deed when you come into the tribulation in which we now are; for though we are in it now, to-morrow you may also be in it. Therefore watch and pray; for you know neither the day nor the hour; and be diligent to please the Lord; for we must all appear before the judgment seat of Christ; that every one may receive the things done in his body, according to that he hath done, whether it be good or bad. 1 Thess. 4:1; 2 Cor. 5:10.
Now, as the Lord is to be feared, I counsel and humbly beseech you, to conform your life to the gospel. For, to bear the name of a Christian, and to be called a brother, avails nothing; but the fulfilling of the commandments of God alone; for I have seen many among us who boast of being Christians, who love Christ with the tongue, but with the deed forsake him (Tit. 1:16), which is greatly to be deplored; for they are like counterfeit money, which from the outside seems to be good gold; but, when brought to the touch-stone, or to the fire, it is nothing but copper within. Thus they walk among the pious, as though they were true Christians; but when the Lord begins to try them in tribulation, it is seen that all is built upon the sand, and that they love their belly more than Christ, as appears now in the case of those that are in bonds with us; for so long they allowed themselves to be called pious brethren, but now they talk differently. Matt. 13:21; 7:26; Rom. 16:18.
Therefore, my dearly beloved brethren and sisters in the Lord, all who desire to offer up an acceptable sacrifice to the Lord, take us for an example (Jas. 5:10) and be followers of us, and be no longer so slothful or lukewarm in love; so that, when you are also imprisoned, you will not sorrow because you did not lead a better life; for with this the devil tempts us night and day. Hence I warn you, out of brotherly love, to take heed to yourselves while you have time; for Paul says: “The grace of God that bringeth salvation hath appeared to all men, teaching us that, denying ungodliness and worldly lusts, we should live soberly, righteously, and godly, in this present world, looking for that blessed hope, and the glorious appearing of the great God and our Savior Jesus Christ; who gave himself for us, that he might redeem us from all iniquity, and purify unto himself a peculiar people, zealous of good works.” Tit. 2:11–14; Eph. 5:2.