The farther explanation given by evolutionists that those ancient forms of life may be the actual ancestors of the present animals, and that through all the ages the Creator was gradually perfecting his work by a series of descents with modification, was probably not before the mind of our ancient Hebrew authority, nor need we attach much value to it till some proof of the process has been obtained from Nature. A farther reason, however, which was intelligible to the author of Genesis, and which is fondly dwelt on in succeeding books of the Bible, depends on the idea that the Creator himself is not indifferent to the marvellous structures, instincts, and powers which he has bestowed upon the lower races of animals. Witness the answer of the Almighty to Job, when he spake out of the whirlwind to vindicate his own plans in creation and providence; and brought before the patriarch a long train of animals, explaining and dwelling on the structure and powers of each, in contrast with the puny efforts and rude artificial contrivances of man. Witness also the preservation, in the rocks, of the fossil remains of extinct creatures, as if he who made them was unwilling that the evidence of their existence should perish, and purposely treasured them through all the revolutions of the earth, that through them men might magnify his name. The Psalmist would almost appear to have had all these thoughts before his mind when he poured out his wonder in the 104th Psalm: "O Lord, how manifold are thy works! In wisdom hast thou made them all. The earth is full of thy riches; So is this wide and great sea, Wherein are moving things innumerable, Creatures both small and great. There go the ships [or "floating animals"]; There is leviathan, which thou hast formed to sport therein: That thou givest them they gather. Thou openest thy hand, they are filled with good; Thou hidest thy face, they are troubled; Thou takest away their breath, they return to their dust. Thou sendest forth thy spirit, they are created, And thou renewest the face of the earth." There are, however, good reasons to believe that, in the plans of divine wisdom, the long periods in which the earth was occupied by the inferior races were necessary to its subsequent adaptation to the residence of man. To these periods our present continents gradually grew up in all their variety and beauty. The materials of old rocks were comminuted and mixed to form fertile soils,[96] and stores of mineral products were accumulated to enable man to earn his subsistence and the blessings of civilization by the sweat of his brow. If it pleased the Almighty during these preparatory stages to replenish the land and sea with living things full of life and beauty and happiness, who shall venture to criticise his procedure, or to say to Him, "What doest thou?"