This work is not written for sceptics; yet while preparing to write for the benefit of others than sceptics, the author's heart has gone out toward that large class of his fellow-men who are sceptical; who, from different causes, have been led to doubt or deny the Bible's being a revelation from God; and he has yearned to say something that would at least arouse the attention of this class sufficiently to cause them to give an earnest investigation, or re-investigation, to the question. The bare possibilities that there is a Hell and a Heaven, that the soul can never cease to exist, and that Jesus is the real Saviour, are enough to cause every doubting one to give the most earnest consideration to any evidence bearing on these questions, and to undertake the most careful investigation of anything that promises to lead to certainty. It will be admitted by every honest disbeliever that no writer has ever made it certain that there is no future existence; that there is no Heaven; that there is no Hell; that Jesus was not the Saviour. The most that such writers have been able to produce is doubts. If, now, there is the possibility of reaching certainty on the other side, surely the reader should be willing and anxious to undertake a calm, searching examination, or re-examination, of the question. If there is no Heaven or Hell, no future existence, no one will ever find it out, before or after death; and there would be but little, if anything, gained if one could find it out. But if there is a Heaven and a Hell, and Jesus is the Saviour, then there is everything to be gained by finding it out and everything to be lost by neglecting to find it out. So important are the issues at stake that you, reader, should be willing to take years, if need be, to make a thorough investigation of the matter; you should be willing to read and study many books, and there are many that would help you; but I wish to urge you to read two books only, before reading this book. Surely your eternal destiny and the destinies of those over whom you have an influence (for "none of us liveth to himself") are enough to cause you to give earnest attention to the reading of three small books. The bare possibility that the reading of the three books may lead to your making sure of Heaven as your eternal home, is enough to prompt you to read them and to read them most carefully and prayerfully. The first is "The Wonders of Prophecy," by John Urquhart. The second is "The Philosophy of the Plan of Salvation," by J. B. Walker (American Edition). Having read these two books prayerfully and carefully, then give this book a careful reading.

But let the reader consider God's plan for investigating. It is often said by a certain class of sceptics that the Bible is against honest investigation, that it shuts off the use of one's reason. Let the word of God speak for itself, "Come now and let us reason together, saith the Lord."—Is. 1:18. The trouble with many sceptics is that they are not willing to "reason together," to reason to get with God, but that they reason against God and to get away from God. Jesus said, "Take heed how ye hear." Watch your heart's attitude when you hear. The attitude of being against God will warp your reasoning when you hear. God's promise is plain to the earnest, honest seeker after God. "And ye shall seek me and find me when ye shall search for me with all your heart."—Jer. 29:13. One who is half-hearted, indifferent, prejudiced against God or against truth, has no right to expect to find God or to find truth. But the promise is positive that the one who seeks with all the heart shall find. Let the reader put God to the test. How can an earnest, honest man refuse to make an earnest, honest investigation?

It was against those who would not make such an investigation that Jesus spoke, Matt. 12:42, "The queen of the south shall rise up in the judgement with this generation and shall condemn it: for she came from the ends of the earth to hear the wisdom of Solomon; and behold a greater than Solomon is here." The heathen woman who went to so much trouble and expense, and took so much time to make a thorough, honest investigation for the truth, will condemn those who do not make an earnest persevering investigation; "And behold a greater than Solomon is here," with His promise, "If any man willeth to do his will he shall know."

Reader, will you carelessly refuse to take the time and to go to the trouble and expense of getting and reading earnestly two books that may lead you to the truth? Oh, reader, outstrip the heathen queen in search of light. Give your life-time, if need be, to an earnest investigation of this matter. Picture two men, one giving his life-time to earnest, honest, searching for the truth concerning sin and salvation through Christ; the other, from indifference, or pride, or prejudice, or love of the world, or secret sin, never making an earnest, honest investigation; the one dying and going to Heaven; the other dying and going to Hell. Which shall it be in your case, reader? There is absolutely no uncertainty as to the result if only you will be honest, and earnest and persevering in your search for the truth. Listen to Jesus: John 7:17, "If any man willeth to do his will, he shall know of the teaching, whether it is of God, or whether I speak from myself." Whether you, reader, are ignorant or learned cuts absolutely no figure in this case. Jesus throws the assurance open to any man. The one condition is if he "willeth to do his will." No man wills to do God's will who will not go to the extreme of earnest, honest, prayerful investigation. If you do, then the veracity, the very character, of Jesus is at stake. Consider, then, reader, the awful responsibility that rests upon you, if you do not give attention to a thorough, earnest, honest, prayerful investigation for the truth.

Another promise of equal certainty comes from the Old Testament: Hosea 6:3, "Then shall we know if we follow on to know the Lord." Many make a slight search and cease. The promise is not to them, but to those who persevere. If we use the light as we receive it, and follow it up, we shall know. Again certainty is promised. Does not God, because He is God, deserve such earnest consideration from you, reader? Have you any right to expect anything from Him if you approach Him in a half-hearted, indifferent way?

The following cases in point may encourage the reader: Two learned men decided to prove that the Bible was not from God, and that Jesus Christ was not the Saviour; but they were in earnest and they were honest. They had vast libraries at their service. They gave months to investigation. They were both convinced and accepted the Saviour and wrote their books in defence of the Bible, instead of against it.

Second, one of the greatest scholars of Europe, probably the greatest, stated in a public lecture in America, that, of the thirty leading sceptics of the nineteenth century, men who had written brilliant books in their young manhood against the Bible, he knew twenty-eight in their old age, and that every one of the twenty-eight, after mature investigation, had accepted the Lord Jesus as Saviour.

Again, in one of the prominent smaller cities of America, a club of sceptics, leading business and professional men, had held weekly meetings for many years. They challenged any one to meet one of their widely known lecturers in a public debate on Christianity and Infidelity. A preacher accepted the challenge. During the debate some of the sceptics became Christians. The president of the debate, a sceptic, is now an earnest follower of the Lord Jesus, having been convinced and having accepted Him as Saviour. The debate was held years ago. So convincing, so overwhelming, was the evidence produced by the defender of Christianity, that the club of sceptics has never held a meeting since the debate.

Similar facts could be produced indefinitely, but these three are sufficient to show the most discouraged, the most hopeless sceptical reader, that there is at least a possibility of his yet finding the truth. Is not a bare possibility, where there are so tremendously important eternal issues at stake, sufficient to cause him to at once begin a thorough, prayerful, honest investigation?

A reflection before closing the Introduction: one hundred years from now, and you, reader, will not be among the living. Where will you be? God has given you a will and the power of choice. Will you will, will you choose, to make an honest, persistent investigation? Tremendous consequences turn on your decision,—your own future destiny, the destinies of others over whom you have an influence. Do not dally with delay. Begin now an honest, earnest, painstaking, prayerful investigation. Get and read the two books suggested, and then finish reading this book. If this course does not settle your difficulties, read on, study on, pray on, and God's promise is sure, that you shall find, that you "shall know"!

FOR FURTHER STUDY: A brief list is here given of books that will be helpful to sceptical readers: "Why Is Christianity True?" by E. Y. Mullins. (One of the most learned Presbyterian theological professors in America, asked to give the names of six of the best books to convince sceptics, replied, "I shall not do it; I shall give one,—'Why Is Christianity True?' by President Mullins of the Southern Baptist Theological Seminary; that is sufficient"); "The Fact of Christ," by Simpson; "The Meaning and Message of the Cross," by H. C. Mabie; "The Resurrection of Our Lord," by W. Milligan; "Many Infallible Proofs," by A. T. Pierson; "The Cause and Cure of Infidelity," by Nelson; "The Word and Works of God," by Bailey; "The Character of Jesus," by Bushnell; "Hours with a Sceptic," by Faunce; "The Miracles of Unbelief," by Ballard; "Creation," by Arnold Guyot; "The Collapse of Evolution," by Townsend; "The Problem of the Old Testament," by James Orr; "Did Jesus Rise?" by J. H. Brookes; "Reasons for Faith in Christianity," by Leavitt; "The Gospel of John;" "The Young Professor," by E. B. Hatcher; "The Resurrection of Jesus," by James Orr.