Now what man of intelligence will believe that the first and the second and the third day, and the evening and the morning existed without the sun and the moon and the stars? And that the first day, if we may so call it, was even without a heaven? And who is so silly as to believe that God, after the manner of a farmer, planted a paradise eastward in Eden, and set in it a visible and palpable tree of life, of such a sort that anyone who tasted its fruit with his bodily teeth would gain life; and again that one could partake of good and evil by masticating the fruit taken from the tree of that name? … I do not think that anyone will doubt that these are figurative expressions which indicate certain mysteries through a semblance of history and not through actual events.
Origen, De Principiis, IV.3.1, Philocalia, I.17.