4. _Those who doubt that the Bible is the word of God._ Romans iii. 3, 4, is useful in showing that questioning the fact does not alter the fact. Matt. xxiv. 35, is often used by the Spirit to carry to the heart of the skeptic the certainty and immutability of God’s word. Mark vii. 13; Matt. v. 18; John x. 35; Luke xxiv. 27, 44, are useful as giving Christ’s testimony that the Old Testament is the Word of God. They are especially helpful in dealing with those who say that they accept the authority of Christ but not that of the Old Testament, for in them Christ sets His seal to the Old Testament Scriptures and they show conclusively that if we accept His authority we must accept that of the Old Testament also. Along the same line John xiv. 26, and xvi. 12, 13, are useful as containing Christ’s indorsement of the New Testament. 1 Thes. ii. 13, can be used with good effect to meet the statement which is often made, that Paul nowhere claims that his teaching is the word of God. 2 Peter i. 21, John viii. 47; Luke xvi. 30, 31, can also be used in dealing with this class. 2 John v. 10, is very effective in showing the guilt of those who believe not the record that God has given. Before using this last passage you can say, “You doubt, do you, that the Bible is the Word of God? Now let us see what God says about those that believe not His testimony;” then turn them to the passage and have them read it. 5. _Those who doubt a future existence._ 1 Cor. xv. 35‒36; Jno. v. 28‒29; Dan. xii. 2. 6. _Those who doubt the doctrine of future punishment, or the conscious, endless suffering of the lost._ Rev. xxi. 8, defines what “death” means when used in the scriptures Rev. xvii. 8, compared with Rev. xix. 20, shows what perdition or destruction means in the scriptures. Rev. xix. 20, compared with Rev. xx. 10 shows that “the lake of fire” is not a place where those consigned to it cease to exist, for we find in the latter passage the beast and false prophet are still there at the end of a thousand years and that they, so far from being annihilated or losing conscious existence are tormented night and day forever and ever. Rev. xiii. 7‒8 show that those who are subjected to the terrible retribution here described are those whose names are not written in the Book of Life. Matt. x. 28 shows that there is destruction for the soul apart from the destruction of the body. Luke xii. 5, shows that after one is killed and is of course dead, there is a punishment in “hell.” Mark iii. 28‒29 (R. V.) shows that there is such a thing as eternal sin. Luke xvi. 23‒26, shows that the condition of the wicked dead is one of conscious torment. Mark xiv. 21, shows that the retribution visited upon the wicked is of so stern a character that it would be better for him upon whom it is visited if he had never been born.