There is no question but that the past is heavy and hindereth every one. Its "cumbrous shells" cling like dead weights around man, and keep him from the larger, freer life. "Man is not by any means convinced as yet of his immortality," says Sir Edwin Arnold; "all the great religions have in concert more or less positively affirmed it to him; but no safe logic proves it, and no entirely accepted voice from some farther world proclaims it." The one proof, of course, so far as absolute evidential demonstration goes, lies in the communication from those who have passed through death. There unfolds an increasingly impressive mass of logical probabilities that point to but one conclusion to every student of science and of spiritual laws. Biology offers its important testimony. The law of the conservation of forces,--of motion and matter,--which is definitely proven by actual demonstration, suggests with a potency which no one can evade that intellect, emotion, and will--the most intense and resistless forces of the universe--can hardly be extinguished when the forces of matter persist. The study of the nature of the ether alone pours a flood of illumination on the theory of an ethereal world,--a theory with which all the known facts of science and psychology accord, and with which they range themselves. Rev. Doctor Newman Smyth says that the facts disclosed by a study of biology, as well as the theories advanced by some trained biologists, fairly open the new and interesting question whether death itself does not fall naturally under some principle of selection and law of utility for life? "It is of religious concern as well as of scientific interest," he continues, "for us to learn, as far as possible, all the facts and suggestions which microscopic researches may bring to our knowledge concerning the minute processes or most intimate and hidden laws of life and death. For if we, children of an age of questioning and change, are to keep a rational faith in spiritual reality,--strong and genuine as was our fathers' faith according to their light, ours must be a faith that shall strike its roots deep down into all knowledge, although light from above alone may bring it to its perfect Christian trust and sweetness.... The least facts of nature may be germinal with high spiritual significance and beauty."