Part IaThe Days of CreationQuestion 70
Work of the Fourth Day of Creation
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The light that was created first was not the light of the luminous heavenly bodies, for these were not created until the fourth day. After the earth was formed and adorned with plants, it was fittingly furnished with the illumination that came with the creation of the luminous heavenly bodies.
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These luminaries are accounted for in scripture which speaks of their usefulness to man, and they were provided for him before he was placed on the earth. They enable man to see with bodily sight; they support life in living bodies; they mark and occasion the changes of season; they are conveniences as signs and forecastings.
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The luminous heavenly bodies are not living bodies.
Full Summa Text · I, Q. 70
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