"Is there not," said I, "a close analogy between the condition of men in reference to the health of their bodies and the science by which they hope to conserve or restore it, and the health of their souls and the science by which they hope to conserve or restore that? Has not God placed them in precisely the same difficulty and perplexity in both cases,--nay, as I think, in greater in relation to medicine,--and yet is not man most willing and eager to apply to its most problematic aid, imparted even by the most ignorant practitioners, rather than be without it altogether? The possession which man holds most valuable in this world, and most men, alas! more valuable than aught in any other world,--LIFE itself,--is at stake; it is subjected to a science, or rather an art, proverbially difficult in theory and uncertain in practice, about which there have been ten thousand varieties of opinion, --whimsically corresponding to the diversity of sect, creed, and priesthood, on which sceptics like you lay so much stress; in which even the wisest and most cautious practitioners confess that their art is at best only a species of guessing; while the patient can no more judge of the remedies he consents, with so much faith, to swallow on the knowledge of him who prescribes them, than he can of the perturbations of Jupiter's satellites. Yet the moment he is sick, away he goes to this dubious oracle, and trusts it with a most instructive faith and docility, as if it were infallible. All his doubts are mastered in an instant. I strongly suspect yours would be. Ought you not in consistency to refuse to act at all in such deplorable deficiency of evidence?"