"In the isolation of his clear, cold intellect, the sceptic abides in a glacial and spectral universe. No glow from the affections lights up the frost and shadow of the grave. He feels no prophecy in the thrill of the human heart-in the incompleteness of nature. He believes merely in things tangible, and sees only in the daytime. He will not confess the authenticity of that paler light of faith which was meant to shine when the sunshine of reason falls short, and the firmament of mystery is over our heads."