The fourth day and the fifth decree call into being the celestial bodies—the sun, moon, and stars. They are called luminaries; that is to say, not masses or accumulations of light, but managers and distributers of light, and the value of this function of theirs, for the religious and secular calendar, for agriculture, navigation, and the daily life of men, is formally and elaborately detailed. Were this account of the heavenly bodies intended as a scientific or exhaustive statement of their Divine destination and place in the universe, it would be miserably inadequate and erroneous. But if the whole aim of the narrative be not science, but religion, then it is absolutely appropriate, exact, and powerful. In the teeth of an all but universal worship of sun, moon, and stars, it declares them the manufacture of God, and the ministers and servants of man. For this practical religious purpose the geocentric description of them is not an accident, but essential. It is not a blunder, but a merit. It is true piety, not cosmical astronomy, that is being established. In the words of Calvin, "Moses, speaking to us by the Holy Spirit, did not treat of the heavenly luminaries as an astronomer, but as it became a theologian, having regard to us rather than to the stars." The net result of the fourth day is the production of the heavenly orbs of light. The fifth day and the sixth work issue in the production of birds and fishes, or, more accurately, all creatures that fly or swim. It is evidently a classification by the eye—the ordinary popular division—and it makes no attempt at scientific pretension or profundity. As having conscious life, these new creatures of God's love are blessed by Him, and have their place and purpose in the order of being defined and established. The net result of the day is the formation of fowls and fishes.