2. Wait patiently, while you work persistently, for the solution of difficulties which may be continuing to press upon you. The experience of the past is an encouragement for the future. The sciences have again and again become their own interpreter, and rejected erroneous inferences. Many examples might be given, but one or two may in the meantime suffice. Human skeletons were found in what seemed old limestone, on the northeast coast of the mainland of Guadaloupe; and after bold attacks on the Bible, which were met by some very weak and irregular defenses, it was ascertained that the whole was a mistake, that the limestone was of very recent formation, that the skeletons were of well-known Indian tribes, and agitation ceased. A similar commotion was raised when the supposed imprints of human feet on limestone had been figured and described in the _American Journal of Science_; and Christians met strange infidel hypotheses by feeble assertions, until Dr. Dale Owen proved the imprints to have been sculptured by an Indian tribe. Thereafter, for a season, the scientific inquirer and the theological student prosecuted their respective investigations in peace. There are important lessons for us in these, and in many similar facts. Christian apologists have often egregiously erred, not only in hastily accepting statements as to supposed facts, but in admitting the validity of the reasoning which has been eagerly founded on them, and in making a fruitless attempt to twist scripture into harmony with what science itself has subsequently disowned. Facts ill observed, and afterward misstated, have drawn many of our best and most candid students into unnecessary collision with biblical critics; and, after much heat in controversy, and the waste on both sides of much intellectual energy, the obstacle lying between them has unexpectedly vanished in the fuller light of science. The evil to be deplored is, that after the errors have disappeared their influence remains. The imprint often lingers after the counterfeit die has been broken.