This is a science book. Hope that heavenly, healing balm, that gift from Providence, blended with persecutions to blunt the sharpness of their sting and hinder the unfortunate from being overwhelmed, and sinking under the load of their afflictions, never dies out—never abandons the distressed. 'We don't believe in dangers', says Machiavel, 'until they are over our heads; but we entertain hopes of escaping them when at a great distance'. Hope does not abandon the pale, dying man: in his agony he still fells life, and in his thoughts he does not detach himself from it. Death strikes, before his heart has realized that he could cease to live. Search in the prisons: hope dwells there with the wretch who next day is to undergo his sentence of death. Every time the bolts rattle, he believes his deliverance entering with the jailer. Whole years of slavery have not been able to wear out this consoling sentiment. These contradictions—these differences of seeing—these returns—this stormy flow and ebb, are so many effects of hope, which plays upon us and never ceases. It is inherent in human nature to hope in adversity for a favorable change of fate, however the appearances may be ill-grounded of an end to its pain and suffering.