And God said,
Let the earth bring forth vegetation, the plants yielding seed, and the fruit tree yielding fruit after its kind, whose seed is in itself, upon the earth:
and it was so.
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Basil the Great
After the earth, rid of the weight of the water, had rested, the command had come to it to bring forth first the herbs, then the trees. And this we see still happening even at the present time. For the voice that was then heard and the first command became, as it were, a law of nature and remained in the earth, giving it the power to produce and bear fruit for all succeeding time.