We shall also consider, in their proper place, the various theories of life which have been advanced from time to time by the materialists, in their avowed hostility to current religious beliefs, and especially those founded on the sacred Hebrew writings, and the supplementary teachings of the New Testament. And to show the extent of this hostility, and the real _animus_ of those waging it, it is only necessary to refer to the great central doctrine of the Sacred Scriptures, that Life--natural, spiritual, eternal--is "the gift of God." And this is the grand corner-stone of all religious edifices--those erected by the Egyptians, the Assyrians, the Phoenicians, the Greeks, and even the inhabitants of farther India. Materialistic science must, therefore, deal its first and most effective blows at "Life," either as a theory to be resolutely assailed and overthrown, or else thoroughly ignored and set aside, in the more imposing and august temple of Science. Hence, the reader will find, in none of the great encyclopedias prepared under the supervision of scientific men, the slightest mention whatever of "Life" as a subject worthy of consideration at their hands. It finds, of course, its meagre definitional place in the dictionaries, but the bulky and more exhaustive encyclopedias have no room for it, except as it may be defined, under some correlate of motion, as "the latent possibility of a nebula," or of "undifferentiated primeval mist," originally pervading the interplanetary spaces.