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Rh often two quite contradictory things. We can see, too, that while they governed and fought, traded and reformed in the world as they imagined it to be, they produced results, or failed to produce any, in the world as it was. They started for the Indies and found America. They diagnosed evil and hanged old women. They thought they could grow rich by always selling and never buying. A caliph, obeying what he conceived to be the Will of Allah, burned the library at Alexandria.

Writing about the year 389, St. Ambrose stated the case for the prisoner in Plato's cave who resolutely declines to turn his head. "To discuss the nature and position of the earth does not help us in our hope of the life to come. It is enough to know what Scripture states. 'That He hung up the earth upon nothing' (Job xxvi. 7). Why then argue whether He hung it up in air or upon the water, and raise a controversy as to how the thin air could sustain the earth; or why, if upon the waters, the earth does not go crashing down to the bottom? Not because the earth is in the middle, as if suspended on even balance, but because the majesty of God constrains it by the law of His will, does it endure stable upon the unstable and the void."

It does not help us in our hope of the life to come. It is enough to know what Scripture states. Why then argue? But a century and a half after St. Ambrose, opinion was still troubled, on this occasion by the problem of the antipodes. A monk