By these words the apostle indicates to us, how necessary and profitable chastisement is for us, yea, so necessary and profitable that we can not be children of God unless we are chastened by our God and heavenly Father, as is clearly declared in these words: “For what son is he whom the father chasteneth not? But if he be without chastisement, whereof all are partakers, then are ye bastards and not sons.” With this accord the words of Judith, namely: that Abraham was tried by many tribulations, and became the friend of God; so also Isaac, Jacob, Moses, and all that pleased God were found faithful through many tribulations. Judith 8:26. But those who did not receive their trial in the fear of the Lord, and showed their impatience and the evil of their murmurings against the Lord, were destroyed by the destroyer, and killed by the serpents. 1 Cor. 10:6; Num. 21:6. Therefore, as gladly as we have God for our Father, so readily must we receive the chastisement of our heavenly Father; and as unwillingly as we would be counted bastards by God, so unwillingly must we also be to be without chastisement and correction, and so willing must we also be to be tried by tribulation. In short, as much as we love God and the salvation of our souls, and as much as we fear the punishment of God, so cheerfully must we receive all sufferings imposed upon us by God, and remember that Christ says: “He that taketh not his cross, and followeth after me, cannot be my disciple.” Matt. 10:38; 16:24; Mark 8:54; Luke 9:23. Also: Whosoever will save his life shall lose it; but whosoever loses his life in this world, for the Gospel’s sake, shall save it forever. Where now are the false Christians, who do not lose their life for Christ’s sake, and still think to keep it in eternity? Yea, so Saul thought that he could please the Israelites, and still remain the friend of God; but God rejected him for his double-mindedness. 1 Sam. 15:26. Thus they may also think to save their temporal life, and still obtain eternal life; but they shall find themselves disappointed in their hope. O Lord God, how can men be so blinded as to so love this transient life, seeing they know neither the day nor hour when they must die; even as the apostle James says that this life is but a vapor, which appears for a little time, and then vanishes away. Jesus Sirach also says that our life, compared with the days of eternity, is as dust or as a grain of sand to all the sand of the sea, or as a drop of water unto all the water of the sea. What then is man! and what is his beauty? or what are his possessions on which he would rely?
Since then our life is so uncertain and brief, it is a lamentable matter, that men take so much care for it, and bestow so little thought upon the eternal life. This is partly owing to false teachers and deceitful laborers, the adversaries of Christ and his apostles, who openly teach that Christians are not to suffer any more.
They shall be confounded with their people, who prophesy lies in the name of the Lord; they shall be punished with Zedekiah and Ahab who shamefully sin, and seduce the Israel of God, causing them to trust in vain things. They shall be put to shame with the Egyptian magicians, who now resist the truth, even as they resisted Moses. They shall be accursed with Balaam the son of Bosor, who with him forsake the right way, and go in crooked paths; yea, they shall sink into hell with Dathan, Korah, and Abiram, who with them caused contention and offense in the church of God, and despise the godly doctrine of Jesus Christ, by which they awaken, the wrath of the Almighty God, and treasure up unto themselves the wrath of God against the day when Christ Jesus shall be revealed from heaven with his mighty angels, in flaming fire, taking vengeance on them that knew not God, and obeyed not the Gospel of our Lord Jesus Christ (Rom. 2:5; Matt. 25:31; 2 Peter 3:4; 2 Thessalonians 1:7–10); who shall suffer pain and everlasting destruction from the presence of the Lord, when he shall come to be glorified in his glory, and glorified in all them that believe in him. Is. 2:10; Wis. 5:2.